Search: An odds ratio of 1.2 (95% confidence interval: 0.8-1.5) is found for the association of low socioeconomic status

Number of results: 11,628

Statistics
Which of the following statements best describes the uncertainty associated with a 95% confidence interval for a population proportion, computed from a simple random sample? A. We don't know whether the particular confidence interval is successful or not, but 95% of ...
Friday, May 18, 2012 at 5:02pm by Mary

statistics
What is meant by the 95% confidence interval of the mean ? That 95% of my sample is OK to do more tests. That I am 95% confident that the confidence interval will contain the parameter being estimated. That 5% of my sample is not OK. That I am 95% sure that the population mean...
Tuesday, August 17, 2010 at 2:29pm by Karen

Statistics
What is meant by the 95% confidence interval of the mean ? That 95% of my sample is OK to do more tests. That I am 95% confident that the confidence interval will contain the parameter being estimated. That 5% of my sample is not OK. That I am 95% sure that the population mean...
Tuesday, June 22, 2010 at 10:47am by Jacob

RES 341
A sample of 300 is taken and the sample mean is computed to be 7.65 and the sample standard deviation is 5. Assume the data is ratio level. Compute the 95% confidence interval on the mean. Compute the 3.9% confidence interval on the mean Which confidence interval is more ...
Saturday, October 16, 2010 at 12:15pm by Meh

Statistics
Which of the following statements correctly interprets a 95% confidence interval on a population mean? a. It is a single point estimate b. Used to quantify the certainty of the sample standard deviation c. A 99% confidence interval is narrower than the 95% confidence interval ...
Wednesday, September 15, 2010 at 9:18am by Beata Chmielewska

Physics
Counting all bounces? That would be 100 (1 + 2*0.95 + 2*0.95^2 + 2*0.0.95^3 + ... centimeters. That is an infinite series, and assumes that the down-to-up ratio is always 0.95. That can be written as 100*(2 + 2*0.95 + 2*0.95^2 + 2*0.0.95^3....) - 100 or, in closed form, as 200...
Monday, January 3, 2011 at 1:12am by drwls

Statistics
I'll give you a hint to help you make the selection: A 95% confidence interval means that there is a 95% probability that the true population proportion lies within the confidence interval.
Friday, May 18, 2012 at 5:02pm by MathGuru

Statistics
Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals: 5.944, 7.956
Wednesday, October 5, 2011 at 3:54pm by Hope

UOP
5) In a 95% Confidence Interval, the true mean has what chance of falling between the Lower Limit and Upper Limits of the calculated confidence interval? A. .90 B. 95% C. .05 D. 5%
Saturday, April 13, 2013 at 2:40pm by Linda

Statistics
1. A certain population follows a normal distribution, with mean m and standard deviation s = 2.5. You collect data and test the hypotheses H0: m = 1, Ha: m 1. You obtain a P-value of 0.022. Which of the following is true? Why? a. A 95% confidence interval for m will include ...
Saturday, November 29, 2008 at 8:32am by Latoya

Stats
2) Find the minimum sample size that should be chosen to assure that the proportion estimate p will be within the required margin of error, .06. Use a 95% confidence interval and a population proportion of .7. The critical value for a 95% confidence level is 1.96
Tuesday, June 14, 2011 at 11:57am by Eric

Statistics
Find the minimum sample size that should be chosen to assure that the proportion estimate p will be within the required margin of error, .06. Use a 95% confidence interval and a population proportion of .7. The critical value for a 95% confidence level is 1.96
Monday, June 6, 2011 at 11:12am by Eric

Statistics
95% confidence interval is approximately 2 standard deviations (SDs) away from the mean in each direction (}2 SD). Do you still believe that the 95% confidence interval would be larger for a smaller SD? I hope this helps. Thanks for asking.
Sunday, October 28, 2007 at 8:18am by PsyDAG

math
The new Twinkle bulb is being developed to last more than 1000 hours. A random sample of 100 of these new bulbs is selected from the production line. It was found that 48 lasted more than 1000 hours. Find the point estimate for the population proportion, the margin of error ...
Sunday, April 17, 2011 at 4:18pm by Heaven

statistics
Pleas HeLp!!!!!!!!!! A random sample of the test scores of 100 applicants for college entry at a large junior college showed a mean score of 72.6. Determine a 99%, 95%, and 90% confidence interval for the m mean score of all applicants at the junior college. Assume the ...
Saturday, September 17, 2011 at 10:00pm by courntey

Statistics
1000 scientists create 95% confidence intervals for parameters of interest. If they all compute the confidence intervals correctly, how many of the intervals would we expect to contain the true population parameter? A. 950 B. 0 C. 95 D. 1000
Friday, May 18, 2012 at 5:04pm by Mary

Statistics:Significance Test and Confidence Interv
Significance Test and Confidence Intervals In General: The article contains a 95% confidence interval. Would the margin of error in a 99% confidence interval computed from the same data be less, the same, or greater?
Tuesday, September 11, 2007 at 4:30pm by Carma

Statistics
A group of scientists created 150 trials to measure whether electric shock treatment could cure paranoid delusions. Of these trials, 52 were successful. Find the margin of error E that corresponds to a 95% confidence level. The critical value for 95% confidence level is 1.96.
Wednesday, June 15, 2011 at 10:35pm by Thomas

statistics
1) A group of scientists created 150 trials to measure whether electric shock treatment could cure paranoid delusions. Of these trials, 52 were successful. Find the margin of error E that corresponds to a 95% confidence level. The critical value for 95% confidence level is 1.96
Tuesday, June 14, 2011 at 11:56am by Shawnie

stats
4. Data from the 2008 General Social Survey (GSS) sample show that the mean number of children per respondent was 1.94 with a standard deviation of 1.70. A total of 2,020 people answered this question. (a) Estimate the population mean number of children per adult using a 90% ...
Thursday, July 26, 2012 at 9:01pm by taylor quenzler

Math-Statistics
Find a confidence interval for ƒÊ assuming that each sample is from a normal population. a. P x = 14, ƒÐ = 4, n = 5, 90 percent confidence b. P x = 37, ƒÐ = 5, n = 15, 99 percent confidence c. P x = 121, ƒÐ = 15, n = 25, ...
Tuesday, December 6, 2011 at 3:48pm by Richard

Elmentary Math for Teachers II
5 red out of eight total 5/8 = .625 probability HOWEVER you said odds, as in betting odds. That is not probability but the ratio of success to failure in this case 5/3
Friday, February 8, 2013 at 4:32pm by Damon

statistics
The Frayed Nerves Anxiety Scale (FNAS) is used to measure the anxiety level of people on a scale from 0 to 1000. Four students were randomly chosen and given the FNAS before their second exam. Their scores were 700, 653, 740, and 707. The standard deviation sigma of the test ...
Monday, October 17, 2011 at 7:10pm by Anand

Environmental Management
A. The 95% confidence interval is: (a) Larger than the 99% confidence interval (b) Smaller than the 99% confidence interval (c) The same as the 99% confidence interval
Monday, July 13, 2009 at 2:35pm by Jox

statistics
Refer to Table 1 in the article “Snail Shells in a Practical Application of Statistical Procedures” in the Electronic Reserve Readings. Find the margin of error, E, with a confidence interval of your choosing (50-99%). What is the significance of choosing a ...
Thursday, April 26, 2012 at 3:37pm by len

statistics
The confidence limits use the mean and the standard deviation (mean ± 1.96 SD for 95% confidence interval)). The less variable the confidence limits (lower SD), the more accurate/precise the estimate is. I hope this helps.
Monday, January 18, 2010 at 9:42am by PsyDAG

statistical applications
In the media, numerous surveys are often displayed reporting percentages or proportions. A margin of error is often reported in the survey and this is used to calculate confidence intervals. Why is it important to create/report confidence intervals (CI) rather than just ...
Friday, May 28, 2010 at 9:21am by cortez

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
95% confidence interval indicates that you have 5% outside the confidence interval and 2.5% on either side. This is an area of .025. You can use a calculator or a t-table to find the critical value. Multiply that value times the standard deviation. add this value to the mean ...
Wednesday, February 13, 2013 at 1:08pm by JJ

statistic
For a given month, a random sample of 30 sales girls from a superstore has a sample mean of salary of RM 800 with standard deviations of RM 140. Estimate the mean monthly salary for all employees using the 95% confidence interval.(what does mean of 95% confidence level?)
Tuesday, September 27, 2011 at 11:08am by niki

Statistics
The 95% confidence interval is: (a) Larger than the 99% confidence interval (b) Smaller than the 99% confidence interval (c) The same as the 99% confidence interval
Sunday, October 28, 2007 at 8:18am by Thano

Statistics
These are the only ones that I am having problems with. Please help.. 8.You are given the sample mean and the sample standard deviation. Use this information to construct the 90% and the 95% confidence intervals for the population mean. Interpret the results and compare the ...
Sunday, February 17, 2013 at 7:05pm by Katie

Statistics
For 95% confidence, mean ± (1.96 standard deviations)/sq rt. of n. For other levels of confidence, the number of standard deviations will vary. It indicates that, if we drew 100 samples, the true population mean will be within this range 95% of the time. Of course, the ...
Tuesday, January 26, 2010 at 10:06am by PsyDAG

Statistics
Can you explain confidence intervals as it relates to the results of this obesity study? Results. Of 3069 sampled students, 2681 (87%) were measured. The prevalence of overweight was 43% (95% confidence interval [CI] = 39%, 47%), more than half of whom were obese. Overall ...
Monday, January 7, 2013 at 7:57pm by DJ

statistics
Consider a 95% confidence interval for a population mean constructed from a random sample of 250 observations taken from a Normal population. Sigma is known to be 14. If we were to construct another 95% confidence interval, this time using 1,000 observations, how would the ...
Sunday, February 20, 2011 at 7:02pm by AMY

math
5/8 is the probability of choosing red. That is probabily what they want. "Odds" (as stated at a horse race, for example), are 3:5. That is the ratio of failure (white) to success (red). Betting odds are stated in various ways. It is important to state which method ...
Thursday, August 12, 2010 at 1:35am by drwls

Statistics
A survey organization takes a simple random sample of 625 households from a city of 80,000 households. On the average, there are 2.30 persons per sample household, and the SD is 1.75. Say whether each of the following statements are True or false and explain (a) The SE for the...
Wednesday, October 26, 2011 at 12:34pm by Joyann

statistics
In a sample of 100 steel wires the average breaking strength is 50 kN, with a standard deviation of 2 kN. a. Find a 95% confidence interval for the mean breaking strength of this type of wire. b. An engineer claims that the mean breaking strength is between 49.7 kN and 50.3 ...
Saturday, October 29, 2011 at 2:18pm by Don't get it!! :(

statistics
how do you get thesampling and confidence intervals for this problem sample scores of 1,2,3,4,5 and 95 percent confidence interval about the sample mean
Friday, October 15, 2010 at 1:39pm by Inez

statistics
Confidence Intervals; In a survey of 1004 individuals, 442 felt that Randolph spent too much time away. Find a 95% confidence interval for the true population proportion
Monday, March 25, 2013 at 10:24pm by ann

Statistics
What is the appropriate sample size for a confidence interval around the sample mean if you want a margin of error of 0.8 with 95% confidence and a population standard deviation of 12.
Friday, November 30, 2012 at 10:05pm by Parul

Math
A random survey of 500 households determines that 20% of the households would do so and that each participating household expects to recycle about 100 cans monthly with a standard deviation of 30 cans. Question (a) What is the 95% confidence interval regarding the percentage ...
Wednesday, April 21, 2010 at 10:00pm by Jamie

statistics
sing the 95% confidence level and the 11th grade male writing scores in the Class Data file, you would expect the lower end of the confidence interval to be approximately what value?" Answer
Monday, November 26, 2012 at 10:09pm by Anonymous

Statistics
In a survey of 633 males ages 18-64, 395 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. The 90% confidence interval for the ...
Sunday, June 10, 2012 at 7:19pm by Anonymous

Stats help
95% confidence = 1.96 You can determine these values by using a z-table. Make a note of the more commonly used confidence intervals so you don't have to constantly refer to the table. It will help you remember them too.
Sunday, May 5, 2013 at 5:46pm by MathGuru

statistics please
a basketball scout randomly selected 144 players and timed howlong eah player took to perform a certain drill. the times in thissample were distributed with a mean of 8 minutes. the populationstandard deviation was known to be 3 minutes. (a) find the critical value for a 95% ...
Saturday, December 15, 2012 at 4:01pm by gina

Statistics
for 95 out 0f 100 of the same size, a 95% confidence interval of a parameter will include the thrue value of that parameter
Monday, July 18, 2011 at 6:57pm by Shak

Statistics
Suppose x has a mound-shaped distribution with sigma = 9 . A random sample of size 36 has sample mean 20. Is it appropriate to use a normal distribution to compute a confidence interval for the population mean m? Explain. Find a 95% confidence interval for m. Explain the ...
Saturday, April 27, 2013 at 6:54pm by Steph

statistics
95% confidence means that you will have 5% left in the two tails. Split this number in half to get .025 in each tail. This is equivalent to a z-score of 1.96 Use this z-score in the formula to find the confidence interval.
Wednesday, March 6, 2013 at 1:21pm by Dr. Jane

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

stats
In a poll of 100 adults, 45% reported they believed in “faith healing.” (USA Today, 20 April 1998). Based on this survey, a “95% confidence interval” for the proportion in the population who believe in faith healing is about 42% to 48%. If this poll had ...
Wednesday, June 23, 2010 at 5:27pm by Anonymous

statistics
we developed a 95% z confidence interval for the mean BMI of women aged 20 to 29 years, based on a national random sample of 654 such women. we assumed there that the population standard deviation was known to be 7.5. in fact the sample data had mean BMI of 26.8 and standard ...
Tuesday, April 20, 2010 at 3:58pm by steven

QNT351
use a 95% confidence interval to estimate the difference between the population means. Interpret the confidence interval. random sample 390 x1 5258 s1 152 x2 5220 s2 192
Thursday, September 27, 2012 at 6:40pm by Terri

math
A card is drawn at random from an ordinary deck of playing cards. Find the following odds. A. Odds in favor of drawing a 5,6,7 B. Odds against drawing a king, queen, jack, or ace D.Odds against drawing an even numbered (2,4,6,8,10)card. Can I get some help with this question ...
Thursday, March 25, 2010 at 3:13pm by grey

statistics
The population standard deviation (σ) for a standardized achievement test that is normally distributed is 8. a.) Calculate the standard error of the mean if you draw a random sample of 50 test scores. Show your work for full credit . .&...
Tuesday, February 21, 2012 at 4:28pm by PK

math
If the probability of an event happening is 1/7, what are the odds against it happening? What is the ratio of the odds against the event?
Monday, January 10, 2011 at 3:47pm by Jack

statistics
A consumer magazine has contacted a simple random sample of 33 owners of a certain model of automobile and asked each owner how many defects had to be corrected with in the first 2 months of ownership. The average number of defects was x with (with line over the x)=3.7, with a...
Thursday, October 15, 2009 at 10:15am by Tammy

Statistics
A simple random sample of 50 female 14-year-olds is selected. The sample mean height of the girls is found to be 62 inches. Assume the height of 14-year-old girls is normally distributed with a standard deviation of 5 inches. 1. Based on these data, a 95% confidence interval ...
Tuesday, November 27, 2012 at 1:45am by Clay

math
that is obviously no squares of odds are always odds sum of two odds is always even
Sunday, March 3, 2013 at 1:17pm by Steve

Statistics
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion. a) State the 95% confidence interval for ...
Wednesday, April 17, 2013 at 11:20pm by Jamie

chemistry
The aspirin content in the analgesic tablets is determined from 120 samples to have a ean of 250 mg with a standard deviation of 5 mg. from a production line, what percentage of the tablets are expected to contain between 243 and 262 mg of aspirin?What is the 95 % confidence ...
Saturday, September 13, 2008 at 6:27pm by Jimmy

statistics
9) A 95% confidence interval for the true mean cholesterol of adult males based on 25 randomly selected subjects extends from 175 mg/L to 250 mg/L. A proper interpretation of the confidence interval would be that: A) 95% of the population has a cholesterol level between 175 ...
Monday, July 2, 2012 at 7:48pm by Anonymous

Epidemiology
• Consider each of the following scenarios and explain whether the variable in question is a confounder: a. A study of the relationship between exercise and heart attacks that is conducted among women who do not smoke. Explain whether gender is a confounder. b. A case-...
Sunday, October 17, 2010 at 5:06pm by Joe

Probablity
5 out of 100? That means odds not occuring is 95/5 or 19/1.
Sunday, October 18, 2009 at 6:30pm by bobpursley

statistics
Use a proportional confidence interval formula: CI95 = p + or - (1.96)(0.015) ...where p = x/n Note: + or - 1.96 represents 95% confidence interval. For p in your problem: 40/400 = .1 I let you take it from here to calculate the interval.
Friday, May 18, 2012 at 10:19pm by MathGuru

statistics
The new Twinkle bulb is being developed to last more than 1000 hours. A random sample of 100 of these new bulbs is selected from the production line. It was found that 48 lasted more than 1000 hours. Find the point estimate for the population proportion, the margin of error ...
Tuesday, April 6, 2010 at 4:27pm by looking for someone to varify my work please

STATISTICS
Bacterial samples were taken from several surfaces in a daycare and incubated in petri dishes. After that the number of bateria colonies were counted, with the following results 412, 437, 425, 476, 451, 483. 1) construct a 95% confidence interval for the mean number of ...
Thursday, October 11, 2007 at 7:26pm by Keirson

Statistics
suppose a random sample of 360 students is drawn form a population of students. Among sampled, the average IQ score is 12 with standard deviation of 3. What is the upper confidence limit of the 95% confidence interval of the population
Wednesday, March 14, 2012 at 3:18am by Arona Basuti

8th math
"odds" do not have the same meaning as probability in general the odds in favour of an event is the ratio of the probability of that event happening to the probability of the event not happening. so you were partly right, the probability of 4 cosecutive tails is 1/15...
Saturday, March 1, 2008 at 4:19pm by Reiny

stats
In order to make sure that their bags of chips are of sufficient weight, the Chipper Chip Company try to fill their 200 gram bags of chips with more than 203 grams. You have been given the task of investigating what proportion of bags produced do have over 203 grams of chips ...
Saturday, October 30, 2010 at 11:27pm by lollzzz

math
a teaher chooses a student at random from a class of 10 boys and 15 girls. Find the odds favor of and for the odds against each event. 1. choosing a girl 2. choosing a boy i don't understand odds of something please help.........
Monday, February 14, 2011 at 5:37pm by megan

Statistics
Consider the trash bag problem. Suppose that an independent laboratory has tested trash bags and has found that no 30-gallon bags that are currently on the market have a mean breaking strength of 50 pounds or more. On the basis of these results, the producer of the new, ...
Monday, August 31, 2009 at 6:59pm by Amy

statistic
1. Past experience indicates that the variance, ¦Ò2x, of the scores, X, obtained on the verbal portion of a test is 5,625. Similarly, the variance ¦Ò2y, of the scores, Y, on the mathematical portion is 2,500. (a) A random sample of size n = 64 ...
Sunday, January 30, 2011 at 12:45am by Tian

statistics
CI95 = mean + or - 1.96(sd divided by √n) ...where + or - 1.96 represents the 95% confidence interval using a z-table, sd = standard deviation, √ = square root, and n = sample size. For the 99% confidence interval, you will have to substitute the value from...
Wednesday, September 30, 2009 at 8:37pm by MathGuru

math
All your given answers are correct For #3 at the top, the letters can be done in 26*25*24 ways. for the numbers I will assume that the zero can be in either of the two number positions, so 10*9 no. of ways = 26*25*24*10*9 = .... for the last part the definition of odds is odds...
Monday, June 1, 2009 at 7:49am by Reiny

Statistics
A random sample of 14 college female students revealed their average height was 66.1 inches. a) How many students should be in a samle if a 95% confidence interval is to have a margin of error of only plus/minus 1 inch? Is that the only information you were given? Were you not...
Monday, July 30, 2007 at 5:01pm by Kasey

statistics
Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.
Saturday, December 8, 2012 at 10:55pm by Lisa

math 8th please help
a teaher chooses a student at random from a class of 10 boys and 15 girls. Find the odds favor of and for the odds against each event. 1. choosing a girl 2. choosing a boy i don't understand what the odds of something would be
Monday, February 14, 2011 at 5:53pm by megan

Statistics (2 mc probs)
I have the following two multiple choice questions that are really throwing me for a loop: 1. Based on 500 people a researcher calculates the 95% confidence interval for the population proportion p: 0.123<p<0.181. a. There is a 95% chance that the true value of p...
Monday, August 4, 2008 at 11:23pm by Joanne

Statistics
Please help!! I have no idea how to do this question. 14. A sample of 40 CD’s from your collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes a. Construct the 95 percent confidence interval for the mean. b. Construct the 95 percent ...
Monday, October 31, 2011 at 1:54pm by Kristi

hypothesis testing and CI
A hypothesis test for a population mean is to be performed at the 5% level of significance. The population standard deviation is known. The hypotheses are H0: ƒÊ = 80 Ha: ƒÊ ‚ 80. A 95% confidence interval for ƒÊ is also constructed...
Wednesday, November 10, 2010 at 11:15pm by lubna

Math
5. The following random sample was selected : 4, 6, 3, 5, 9, 3. Find the 95% confidence interval for the mean of the population. 6. In a sample of 35 high school seniors, 14 of them are attending college in the fall. Find the 95% confidence interval for the true proportion of ...
Thursday, May 9, 2013 at 1:17pm by Anonymous

Statisics Question Help Please
Confidence interval using proportions: CI95 = p + or - (1.96)(√pq/n) ...where + or - 1.96 represents 95% confidence using a z-table. Note: p = 55/450 (convert to a decimal); q = 1 - p; and n = 450 (sample size). I'll let you take it from here.
Thursday, October 6, 2011 at 12:01am by MathGuru

statistics
Use a proportional confidence interval formula: CI95 = p + or - (1.96)(√pq/n) Note: + or - 1.96 represents 95% confidence interval. For p in your problem: .42 For q: 1 - p = 1 - .42 = .58 n = 1500 I let you take it from here to calculate the interval.
Monday, March 25, 2013 at 10:46pm by MathGuru

stats
3. The mean family income in Arizona is about $64,750 with a standard deviation (for the population) of $59,750. Imagine that you are taking a sample of 200 randomly selected state residents. (a) What is the probability that your sample mean is between $61,000 and $64,750? (b...
Thursday, July 26, 2012 at 9:00pm by taylor quenzler

statistics
Linear Regression In the babies.dta full dataset, generate a covariate called painind defined as 1 if the infant experienced severe pain upon receiving the shot (pain0 = 7) and as 0 otherwise. In Stata, you can use the commands: generate painind = 0 replace painind = 1 if ...
Monday, January 14, 2013 at 6:26pm by Anonymous

Statistics
Assume that a random sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. 95% confidence the sample size is 2096 of which 25%are successes The margin of E= (round to four decimal places ...
Tuesday, April 30, 2013 at 12:29am by Rob

statistics
Use confidence interval formulas to construct the interval for µ. CI95 = mean + or - 1.96 (sd/√n) ...where + or - 1.96 represents the 95% interval using a z-distribution, sd = standard deviation, and n = sample size. Confidence interval using a t-distribution ...
Thursday, October 15, 2009 at 10:15am by MathGuru

Statistics
A survey of community banks asked about the loan to deposit ratio (LTDR) a banks total loans as a percent of its total deposits. The mean LTDR for the 110 banks in the sample is xbar = 76.7 and the standard deviation is s = 12.3. In the text a 95% confidence interval (using a ...
Monday, February 26, 2007 at 3:35pm by Jason L

Math
Odds....I hate teaching that. If in a contest, 3 people can win, and 5 loose, the probablility of winning is 3/8 The odds are stated to be 3:5 It is a crazy system. Bet on a horse 1:1, and you have .5 probabliltiy of winning. So here, 117 winners, 168 loosers, so the ...
Friday, July 22, 2011 at 11:46am by bobpursley

Statistics
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could make 6 deliveries per hour with a standard...
Friday, May 3, 2013 at 11:45am by Cam

Statistics
If someone gives you a sample mean and a standard deviation, you can find a confidence interval. But what if someone gives you the confidence interval instead and asks you to find the sample mean? How can you do that? Here's an example: a 95% confidence interval for a mean...
Tuesday, October 4, 2011 at 7:30pm by Hope

math
i think this is the answer 2m^2+10n-4n^3+9=95 2(-5)^2+10(-2)-4(-2)^3+9=95 2(25)-20-4(-8)+9=95 50-20+32+9=95 30+41=95 71=95 95-71=24 i hope it was helpful
Saturday, September 25, 2010 at 3:12pm by Ted

statistics
A school psychologist is trying to determine the lower boundary of a confidence interval for a IQ measure that has a mean of 100 and a standard deviation of 30 and a sample size of 100. What is the lower boundary if she was to create a 95% confidence interval?
Friday, July 1, 2011 at 5:22pm by Haywood

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