Thursday

April 24, 2014

April 24, 2014

Number of results: 8,268

**qnt/351**

Which of the following statements about the two sample sizes is NOT true? Assume thepopulation standard deviations are equal A. Sample A = 11; sample B = 13 B. Sample A = 12; sample B = 14 C. Sample A = 13; sample B = 13 D. Sample A = 10; sample B = 16
*Monday, March 31, 2014 at 2:10pm by arelis*

**algebra 1**

Circle the most appropriate description. 27.A city planning commitee surveys 100 people waiting at a bus stop about the expansion of the public transportation system. Random Sample,systematic sample,self-selected sample, convenience sample, bipartisan sample,stratified random...
*Monday, May 20, 2013 at 1:20pm by janet*

**Chemistry**

consider 2 sample of nitrogen gas. sample 1 contains 1.5 mol of N2 and has a volume of 36.7L at 25C and 1 atm. sample 2 has a volume of 16.5L at 25C and 1 atm. calculate the number of moles of N2 in sample 2 do i use the pv= nrt equation? and do i only use the information ...
*Tuesday, June 8, 2010 at 8:13pm by Anonymous*

**Math**

How can you classify the 2 examples that you gave in part c? Is it: Simple random sample Systematic random sample Voluntary response sample Convenience sample Or Stratified random sample? Thank you.
*Tuesday, September 2, 2008 at 5:47pm by Happyface*

**stat.**

A sample consists of the following n 6 scores: 2, 7, 4, 6, 4, and 7. a. Compute the mean and standard deviation for the sample. b. Find the z-score for each score in the sample. c. Transform the original sample into a new sample with a mean of M 50 and s 10.
*Sunday, January 27, 2013 at 11:31am by Nickie*

**Statistics**

. A random sample is selected from a normal population with a mean of __40 and a standard deviation of __10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M _ 42. a. How large a sample is necessary for this sample mean to be...
*Thursday, January 26, 2012 at 10:04pm by Sharon*

**Probabilty & Statistic**

A random sample is selected from a normal population with a mean of __40 and a standard deviation of __10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M _ 42. a. How large a sample is necessary for this sample mean to be ...
*Monday, January 23, 2012 at 4:39pm by Sharon*

**gre math prob of a sample**

sample standard deviation = 3 sample mean = 68 n=30 what is the probability that one student selected at random from the sample will have a height within one sample standard deviation of the sample mean? a. 1.00 b. 0.73 c. 0.57 d. 0.23
*Tuesday, January 10, 2012 at 10:50pm by luckybee*

**statistics**

Your samle is normally distributed with a mean age of 57. The standard deviation iin this sample is 5 years.The 2000 census shows your sample is older than a randomly selected national sample. The median agein your sample is?
*Monday, June 3, 2013 at 11:45am by statistics*

**statistics**

What are the sample median and the mode for males? The sample mean mark of the 50 male students is 8.30. If the sample mean for the entire sample is 8.42, what is the sample mean for the 75 female students?
*Wednesday, September 12, 2012 at 1:47am by Maria*

**statistics**

What are the sample median and the mode for males? The sample mean mark of the 50 male students is 8.30. If the sample mean for the entire sample is 8.42, what is the sample mean for the 75 female students?
*Wednesday, September 12, 2012 at 1:47am by Maria*

**STAT**

You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 15 and a sample standard deviation 6 and a sample size of 18. Machine 2 has a sample mean of 12 and a sample standard deviation of 6 with a sample size of 18. With an...
*Friday, October 4, 2013 at 5:07pm by Tammy*

**statistics ***pls help!**

for each of the following, assume the 2 samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the 2 sample means. a)each sample has n = 5 scores with s^2 = 38 for the first sample, and s^2 =42 for the ...
*Thursday, April 14, 2011 at 11:40pm by jerr *******

**Statistics**

Are these statements true or false? 1. The sample mean, the sample proportion and the sample standard deviation are all unbiased estimators of the corresponding population parameters. 2. If the population is normally distributed with known variance then the sample mean may not...
*Friday, November 5, 2010 at 5:03pm by help*

**chemistry**

if the ration of water drops to EDTA is 6.7 for the known sample and 10 for the unknown sample what is the concentration of the unknown sample? (The concentration of the known sample is 315 ppm) a. 150mg/L b. 210mg/L c. 280mg?L d. 320mg/L
*Wednesday, May 12, 2010 at 12:38pm by alex*

**statistics**

from a normally distributed infinite number of iron bars lengths with a mean and standard deviation as 4 ft. and 0.6 ft. respectively, a sample of 100 bars is taken. if the sample mean is 4.2 ft., can the sample be called a truely random sample?
*Monday, April 22, 2013 at 3:39am by aman*

**Statistics**

For a population with a mean of (mew) = 50 and a standard deviation of 10, how much error, on average, would you expect between the sample mean (M) and the poulation mean for: a) a sample of n=4 scores b) a sample of n=16 scores c) a sample of n=25 scores Are the sample mean (...
*Tuesday, May 24, 2011 at 2:44pm by Aestas*

**statistics**

A sample of 100 iron bars is said to be drawn from a large number of bars. Whose lengths are normally distributed with mean 4 feet and S.D 0.6ft. If the sample mean is 4.2 ft, can the sample be regarded as a truly random sample?
*Wednesday, July 17, 2013 at 2:49am by Sankar*

**statistics**

given a sample size of 30, and one sample t=-2.5, what would conclude about the sample from which the mean was drawn?
*Sunday, April 24, 2011 at 6:27pm by ryee*

**statistics**

if a sample of a distribution of sample size 26 has a range of 56, then what would be an estimate of the sample standard deviation
*Thursday, February 14, 2013 at 1:02pm by karen*

**MATH**

oN A SPECIAL SCALE IN THR SCIENCE LAB, SCOYTT WEIGHED SAMPLES OF DIFFERENT KINDS OF SOIL. SAMPLE A WEIGHED 3 OUNCES. SAMPLE B WEIGHED 814 THOUSANDTHS OF AN OUNCE MORE THAN SAMPLE A. WHAT DECIMAL SHOULD SCOTT USE TO RECORD THE WEIGHT OF SAMPLE B?
*Wednesday, September 16, 2009 at 7:38pm by LANA*

**statistics**

a random sample of 20 prices for summer sleeping bags was taken with a sample mean of $83.75 and a sample standard deviation of $29.97
*Sunday, April 29, 2012 at 1:57pm by julie*

**science**

if you have two samples of the same volume. the mass of sample A is higher than that of sample B. which sample has the greatest density?
*Sunday, February 16, 2014 at 3:08pm by n*

**statistics**

7. A sample of 40 observations is selected from one population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second population. The sample mean is 99 and the sample standard deviation is 6. Conduct the following ...
*Sunday, February 28, 2010 at 11:51pm by Barbara*

**Statistics**

8. A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is .75. A sample of 50 observations is selected from a second population. The sample mean is 2.59 and the sample standard deviation is .66. Conduct the ...
*Sunday, February 28, 2010 at 11:52pm by Barbara*

**chemistry**

CrCl3(s) + AgNO3 (aq)= AgCl(s) + Cr(NO3)3(aq) A 0.750 g sample of impure CrCl3 was removed from a bottle that contained 1.75 g of impure sample. The removed sample was dissolved in water and required 42.5 mL of 0.215 M AgNO3 solution to react with the CrCl3 in the sample. What...
*Monday, March 12, 2012 at 10:12pm by jade*

**chemistry**

Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath of Na2O Submerge the ...
*Friday, April 26, 2013 at 2:09pm by ssss*

**Chemistry**

Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath of Na2O Submerge the ...
*Saturday, April 27, 2013 at 1:52am by Anon*

**chemistry**

Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath of Na2O Submerge the ...
*Sunday, April 28, 2013 at 5:57am by a*

**Chemistry**

Suppose you had a 100.0 gram sample of iron and that 1.00 kJ is applied to the sample . by what amount would the temperature of the sample be raised?
*Tuesday, December 14, 2010 at 9:48pm by Dana*

**statistics**

1. A random sample of size 49 is taken from a large population, measuring the time it takes to complete a driver’s license examination. The sample mean was found to be 47 minutes, and the sample standard deviation 5.89 minutes. Construct a 95% confidence interval around the ...
*Friday, July 16, 2010 at 2:53pm by Anonymous*

**statistics**

A random sample of size 81 is taken from a large population, measuring the time it takes to complete a driver’s license examination. The sample mean was found to be 43 minutes, and the sample standard deviation 5.71 minutes. Construct a 95% confidence interval around the ...
*Monday, July 16, 2012 at 12:27pm by Devika*

**Chemistry**

a sample of helium gas is in a closed system with a movable piston. the volume of the gas sample is changed when both the temperature and the pressure of the sample are increased. the table below shows the initial temperature, pressure, and volume of the gas sample, as well as...
*Tuesday, April 19, 2011 at 5:05am by Shanee*

**chemistry**

a sample of indium chloride is known to be contaminated with sodium chloride. The contaminated sample weighs 2.87 g. When the contaminated sample is treated with excess AgNO3(aq), 5.79 grams of AgCl(s) are obtained. What is the percentage by mass of InCl3 in the sample?
*Monday, November 22, 2010 at 12:44pm by Anonymous*

**Math**

Scott weighed samples of different kind of soil. Sample A weighed 3 ounces. Sample B weighed 814 thousandths of an ounce more than sample A. what decimal should Scott use to record the weight of sample B?
*Tuesday, August 31, 2010 at 5:50pm by Bonnie*

**statistics**

For normal population mean 60, standard deviation 15, after treatment is given to the member of sample , the sample mean is 65, and sample size is 25. is the sample mean sufficient to conclude that the treatment has significant effect? Give reason for decision?
*Saturday, August 11, 2012 at 11:38pm by Anonymous*

**Government**

1) The portion of the population selected to participate in a poll is known as the a. public b. population c. deliberative group d. sample e. focus group 2) A sample that does not overrepresent any portion of the population and whose responses can therefore be safely ...
*Saturday, October 11, 2008 at 11:19pm by sam*

**statistics**

draw a simple random sample of 15 students from your class,and calculate sample mean and sample variance of their heights(use lottery method)
*Thursday, June 2, 2011 at 12:25pm by sireesha*

**statistics**

Determine the 90% confidence interval for a sample, taken from a normally distributed population, that has a mean of 685, a sample standard deviation of 74, and a sample size of 29
*Tuesday, November 1, 2011 at 3:13pm by Tierra*

**statistics**

Determine the 90% confidence interval for a sample, taken from a normally distributed population, that has a mean of 685, a sample standard deviation of 74, and a sample size of 29
*Tuesday, November 1, 2011 at 3:32pm by Tierra*

**psychology **

If you conclude that the participant's in a study are a representative sample, then you can from the research sample to the larger population. a. replicate b. speculate c.generalize d.sample e. none of the above
*Tuesday, June 25, 2013 at 3:17pm by Taylor B *

**math **

on a special scale in the science lab Scott weighed samples of different soils. Sample A weighed 3 ounces. Sample B weighed 814 thousandth of an ounce more than sample A. What decimal should Scott use to record the weight for sample B
*Tuesday, September 10, 2013 at 7:34pm by damian *

**Chemistry**

1.) A 3.000gram sample of a hydrate compound containing Co, C2O4, and H2O was combusted to give 1.316g of Co3O4. What is the percentage of Cobalt in the oxide? 3.) 2.000 grams of a sample containing Co, C2O4, and H2O showed there to be 0.9621g of oxalate in the sample. Was is...
*Sunday, March 3, 2013 at 10:01pm by Robert*

**Stats**

A simple random sample will be obtained from a normally distributed population. Find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 5% of the standard deviation. Is such a sample size practical in most cases? The minimum ...
*Monday, November 28, 2011 at 9:50pm by Lindsey*

**math**

on a special scale in the science lab, scott weighed samples of different kind of soil.sample A weighed 3 ounces. sample B weighed 814 thousandths of an ounce more than sample A. what decimal should scott use to record the weight of sample B.
*Monday, September 21, 2009 at 7:04pm by Anonymous*

**phoenix**

Each sample has n= 5 scores with s2 =38 for the first sample and s2 = 42 for the second. (Note: Because the two samples are the same size, the pooled variance is equal to the average of the two sample variances.)calculate how much difference should be expected, on average, ...
*Sunday, May 12, 2013 at 10:23am by diana*

**Math Statistics**

A sample has a mean of M = 25. If one person with a score of X = 25 is added to the sample, what effect will it have on the sample mean? Why and how is there no effect on the sample mean? I am not really understanding this?
*Saturday, September 29, 2012 at 2:20pm by Misty*

**Statistics: Sample Size, Variance and Standard Dev**

Sample Size, Variance and Standard Deviation A student organization plans to ask 100 randomly selected students how much they spent on textbooks last semester. You argue for a sample of 900 students instead of 100. You know the standard deviation of the sample mean x of the ...
*Tuesday, September 11, 2007 at 4:26pm by Carma*

**Statistics**

An educator wants to estimate the proportion of school children in Boston who are living with only one parent. Since their report is to be published, they want a reasonably accurate estimate. However, since their funding is limited, they do not want to collect a larger sample ...
*Monday, September 13, 2010 at 9:04pm by Sarah*

**statistics**

A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second source. The sample mean is 99 and the standard deviation is 6. Conduct a ...
*Saturday, May 22, 2010 at 7:29pm by K*

**statistics**

A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and the sample standard deviation is 5. A sample of 50 observations is selected from a second source. The sample mean is 99 and the standard deviation is 6. Conduct a ...
*Saturday, May 29, 2010 at 5:35pm by georgia*

**Math**

Suppose a population is sampled and the sample mean is 16.8. The sample standard deviation is 6.0 I am to assume the sample is larger than 30) and the sample size is 65. How do I calculate 95% and 98% confidence intervals. State which interval wider and why please. How would I...
*Wednesday, February 13, 2013 at 10:58pm by Mandi*

**statistics**

a simple random sample will be obtained from a normally distributed population. find the minimum sample size needed to be 95% confident that the sample standard deviation (s) is within 10% of sigma. please help!
*Saturday, April 16, 2011 at 12:03pm by lucy*

**statistic**

. For each of the following, assume that the two samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the two sample means. a. Each sample has n _ 5 scores with s2 _ 38 for the first sample and s2 _ 42...
*Sunday, November 11, 2012 at 8:25pm by Sharon*

**chemistry**

A glass of composition 85% SiO2 - 15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens approximately the size and shape of credit cards are soaked for the same amount of time at 850 C. Sample A is soaked in NaCl and sample B is soaked in ...
*Wednesday, April 10, 2013 at 8:40am by Anonymous *

**chemistry**

A glass of composition 85% SiO2 - 15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens approximately the size and shape of credit cards are soaked for the same amount of time at 850degreeC. Sample A is soaked in NaCl and sample B is ...
*Friday, April 12, 2013 at 6:36pm by adex*

**statistics**

A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is 15. a) Compute the 95 % confidence interval for the population mean. b) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence ...
*Thursday, April 7, 2011 at 5:35pm by TIMBERLY*

**chemistry**

A glass of composition 85% SiO2 - 15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens approximately the size and shape of credit cards are soaked for the same amount of time at 850 ∘C. Sample A is soaked in NaCl and sample B is ...
*Wednesday, April 10, 2013 at 8:54am by Din123*

**Chemistry**

A glass of composition 85% SiO2 - 15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens approximately the size and shape of credit cards are soaked for the same amount of time at 850 ∘C. Sample A is soaked in NaCl and sample B is ...
*Wednesday, April 10, 2013 at 10:06am by Anonym*

**chemistry**

A glass of composition 85% SiO2 - 15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens approximately the size and shape of credit cards are soaked for the same amount of time at 850 ∘C. Sample A is soaked in NaCl and sample B is ...
*Saturday, April 13, 2013 at 5:48am by s*

**Chemistry**

A glass of composition 85% SiO2 - 15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens approximately the size and shape of credit cards are soaked for the same amount of time at 850∘C. Sample A is soaked in NaCl and sample B is ...
*Saturday, April 13, 2013 at 3:59pm by Alan*

**Statistics**

The mean of a population of raw scores is 33 1_X 5 122 . Use the criterion of .05 and the upper tail of the sampling distribution to test whether a sample with X 5 36.8 1N 5 302 represents this population. (a) What is the critical value? (b) Is the sample in the region of ...
*Thursday, February 13, 2014 at 2:09am by Anonymous*

**managerial statistics**

student conduct a study and reported that 95% confidence intervak for themean ranged from 46-54. He was surethat the mean of the sample was 50,that the standard deviation of the sample was 16and that the sample was atleast 30 but could not remember exact number. can you help me
*Tuesday, March 27, 2012 at 9:51am by noela*

**statistics**

A Packaging Company sells soda and claims each can contains 12 oz. A random sample of 15 sodas yielded a sample mean of 11.2 oz. Given the sample standard deviation is 0.3 oz, estimate the margin of error for a 90% confidence interval.
*Thursday, March 29, 2012 at 10:15pm by robert*

**biochemistry**

A 20.0 mL sample of gastric juice was taken from a patient suspected of having hypochloridia (low stomach acid). The sample was taken several hours after a meal so there was no ingested food or drink, and it was assumed no buffers were present. The sample required 6.3 mL of 0....
*Sunday, January 13, 2013 at 5:44pm by stoic-rider77*

**statistics**

The sample mean is 12 for a sample of 26. The sample deviation is 3. Use the .02 level of significance The following information is available. H0: ≤ 10 H1: > 10
*Tuesday, May 3, 2011 at 11:11pm by Anonymous*

**math**

sample A weighed 3ounces, sample B weighed 814 thousandths of an ounce more, what decimal should be used to record the weight of sample B
*Thursday, September 23, 2010 at 10:05pm by sam*

**statistics**

10. A random sample of n=36 scores is selected from a normal distribution with a mean of u=60. After a treatment is administered to the individuals in the sample, the sample mean is found to be M=52.
*Tuesday, April 5, 2011 at 10:07pm by Anonymous*

**John jay college**

A random sample of n = 9 scores is obtained from a population with μ = 50 and σ = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean?
*Sunday, July 22, 2012 at 5:57pm by Samantha *

**Chemistry**

A sample of InCl3, is known to be contaminated with NaCl. The contaminated sample weighs 2.84g. When the contamintaed sample is treated with excess AgNO3(aq). 574 grams of AgCl(s) are obtained. What is the percentage by mass of InCl3 in the sample? (All I really need to know ...
*Sunday, January 21, 2007 at 4:05pm by Carlos*

**chemistry**

Please help me through this problem... A 0.5117 gram fertilizer containing phsphorus was oven dried. The weight of the dried sample is 0.4998 grams. However, 10% moisture is still retained in the sample. Calculate the moisture content in the sample in as received and dry basis...
*Friday, August 31, 2007 at 12:24pm by smiley*

**chemistry**

A sample of propane(c3h8)has 3.84x10^24 H atoms. a) how many carbon atoms does the sample contain? b) what is the total mass of the sample?
*Saturday, January 15, 2011 at 2:19am by Jessica *

**statistics**

A sample of n = 9 scores has a mean of M _ 10. One person with a score of X _ 2 is removed from the sample. What is the value for the new sample mean?
*Wednesday, June 22, 2011 at 12:41am by Liz *

**Math Statistics **

A sample has a mean of M = 25. If one person with a score of X = 25 is added to the sample, what effect will it have on the sample mean?
*Saturday, September 29, 2012 at 2:01pm by Misty*

**Math**

A sample of n _ 11 scores has a mean of M _ 4. One person with a score of X _ 16 is added to the sample. What is the value for the new sample mean?
*Saturday, October 20, 2012 at 9:42pm by Sharon*

**stats**

A random sample of n=16 scores is obtained from a population with a mean of µ= 80 and a treatment is administered to the sample. After treatment, the sample
*Wednesday, March 20, 2013 at 2:04pm by delaney*

**chemysteryyy!!!!**

Rubbing Alchol often contains propanol, C3H7OH. Suppose that you have an 85.9g sample of propanol. a) Howmany carbon atoms are in the sample? b) Howmany hydrogen atoms are in the sample? C)Howmany oxygen atoms are in the sample? PLEASE!! explain the steps to me...I don't know ...
*Wednesday, December 26, 2012 at 10:44am by Kristy*

**John jay college**

A random sample of n = 9 scores is obtained from a population with μ = 50 and σ = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean? z = 3.00 z = 1.00 z = 9.00 cannot determine without additional information
*Sunday, July 22, 2012 at 5:59pm by Samantha *

**statistics**

A random sample of n = 9 scores is obtained from a population with ì = 50 and ó = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean?
*Sunday, November 6, 2011 at 1:02pm by Anonymous*

**statistics**

A sample from a population with = 40 and = 10 has a mean of M = 44. If the sample mean corresponds to a z = 2.00, then how many scores are in the sample? a. n = 100 b. n = 25 c. n = 5 d. n = 4
*Wednesday, January 8, 2014 at 7:33pm by Lyndyc*

**stats**

A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are less than 69?
*Monday, January 23, 2012 at 10:03pm by dan*

**chemistry**

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?
*Tuesday, January 24, 2012 at 9:08pm by Martha*

**chemistry**

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?
*Tuesday, January 24, 2012 at 10:00pm by Martha*

**chemistry**

treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?
*Tuesday, January 24, 2012 at 11:34pm by Martha*

**physics lab**

For an unknown sample of the experiment, students measure 1602 counts when they first receive their sample and 1317 counts 3.5 minutes later. Calculate the half-life t12 of their sample.
*Wednesday, November 14, 2012 at 1:30am by Lauren*

**Statistics**

he Oil Price Information Center reports the mean price per gallon of regular gasoline is $ 3.79 with a population standard deviation of $ 0.18. Assume a random sample of 40 gasoline stations is selected and their mean cost for regular gasoline is computed. 1. What is the ...
*Sunday, September 26, 2010 at 5:25pm by John*

**CHEMISTRY**

In a certain compound of copper and oxygen, a sample weighing 0.5424g contains 0.4831 g of Cu. How many moles of Cu in the sample? How many grams of Oxygen and how many moles of Oxygen are there in the sample? What is the mole ratio of Cu/O in the sample? What is the formula ...
*Monday, February 18, 2013 at 8:35pm by Jester21*

**chemistry**

In a certain compound of copper and oxygen, a sample weighing 0.5424g contains 0.4831 g of Cu. How many moles of Cu in the sample? How many grams of Oxygen and how many moles of Oxygen are there in the sample? What is the mole ratio of Cu/O in the sample? What is the formula ...
*Monday, February 18, 2013 at 8:36pm by Jester21*

**Statistics**

A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If sample proportion, P^, is the sample ...
*Friday, March 22, 2013 at 3:59pm by Grace*

**CHEMISTRY**

A sample of C3H8 has 2.64 x 10^24 atoms. How many carbon atoms does the sample contain? What is the total mass of the sample?
*Saturday, September 24, 2011 at 2:32pm by Alejandra*

**% Recovery**

How do you calculate percent recovery? I have this info: Weight of sample used: 0.198g Actual weight of sample: 0.325g Other info needed? What you have posted is confusing. What do you mean by "actual weight of sample?" Is that different than the weight of sample used? I ...
*Monday, February 19, 2007 at 5:57pm by Anonymous*

**Marketing **

There are 1000 students in the University of A. A sample of 10 observations was obtained regarding the rating of the service quality of dining hall. Here is the sample: Observation Rating 1 5 2 6 3 7 4 3 5 8 6 5 7 6 8 3 9 4 10 7 calculate the confidence interval of the sample...
*Saturday, March 27, 2010 at 4:05pm by JL*

**Assignment Help **

There are 1000 students in the University of A. A sample of 10 observations was obtained regarding the rating of the service quality of dining hall. Here is the sample: Observation Rating 1 5 2 6 3 7 4 3 5 8 6 5 7 6 8 3 9 4 10 7 calculate the confidence interval of the sample ...
*Sunday, March 28, 2010 at 11:38am by JL*

**statistics**

Assuming that the population variances are equal for Male and Female GPA’s, test the following sample data to see if Male and Female PhD candidate GPA’s (Means) are equal. Conduct a two-tail hypothesis test at á =.01 to determine whether the sample means are different. Do NOT ...
*Wednesday, October 6, 2010 at 9:37am by Anonymous*

**Statistics**

For a population with a mean of µ=60 and standard deviation of Ợ=24, find the z=score corresponding to each of the following samples a. M=63 for sample of n=16 scores b. M=63 for sample of n=36 scores c. M=63 for sample of n=64 scores
*Friday, December 13, 2013 at 7:12pm by Lyndyc*

**statistics**

in 1995,the gallup poll asked a sample of 620 adults whether their support of baseball had been affected by a recent player strike,248 people in the sample said "yes".identify the population,parameter,sample,and statistic in this setting
*Thursday, December 8, 2011 at 1:29pm by kim*

**STATISTICS**

According to the Central Limit Theorem, The traditional sample size that separates a large sample size from a small sample size is one that is greater than 100 30 500 20
*Thursday, June 10, 2010 at 6:09pm by John*

**chemistry**

A 1.10g- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0ML , the osmotic pressure of the solution is 3.78atm at 298K a.What is the percent by mass of glucose in the sample? b.What is the percent by mass of ...
*Sunday, January 24, 2010 at 11:02pm by bf*

**stats**

sample of n=64 scores is obtained from population with standard deviation =15 sample mean is 10 pts greater than the poulation mean what is zscore for sample mean
*Friday, March 22, 2013 at 2:55pm by tita*

**STATISTICS**

WHAT DOES THE CENTRAL LIMIT THEOREM SAY ABOUT THE TRADITIONAL SAMPLE SIZE THAT SEPARATES A LARGE SAMPLE SIZE FROM A SMALL SAMPLE SIZE?
*Thursday, July 18, 2013 at 9:35pm by LINDA*

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