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November 26, 2014

November 26, 2014

**Recent Homework Questions About Statistics**

Post a New Question | Current Questions

**Math Statistics**

2. A statistics professor has asked his students to flip coins over the years. He has kept track of how many flips land heads and how many land tails. Combining the results of his students over many years, he has formed a 95% confidence interval for the long-run population ...
*Saturday, July 27, 2013 at 2:19pm*

**Statistic/Psychology**

If the correlation between one's interest in statistics and being a "fun date" was -0.70, it would mean that: a. The higher someone's interest was in statistics, the more likely it would be that he or she is a fun date b. The higher someone's interest was...
*Friday, July 26, 2013 at 7:08pm*

**Statistics**

Multiple Choice Which of the following statements is true about the 95% confidence interval of the average of a sample? A) 95 of 100 avgs of samples will be within the limits of the confidence interval. B) There is a 95% chance the avg of the population to be within the limits...
*Friday, July 26, 2013 at 6:00am*

**Statistics**

True or False Questions. Statistics' students of a class of Lyceum want to calculate the average number of chocolate pieces in a standard package of biscuits SANTAS. They choose a random sample of biscuits, measure chocolate pieces in each cookie and calculate the 95% ...
*Friday, July 26, 2013 at 5:49am*

**Statistics**

The inside diameter of the automobile wheel bearing sets at a factory is expected to be normally distributed with a mean of 1.30inches and a standard deviation of 0.04 inches. What is the probability that a randomly selected wheel bearing will have an inside diameter of, a) ...
*Thursday, July 25, 2013 at 7:56pm*

**statistics**

The scores for standardized test are normally distributed with a mean of 300 and standard deviation of 39. If the test is given to 700 students, how many are expected to have scores between 300 and 378.
*Thursday, July 25, 2013 at 5:51pm*

**statistics**

A simple random sample of voters will be taken in a large state. Researchers will use the methods of our course to construct an approximate 95% confidence interval for the percent of the state’s voters who will vote for Candidate X. The minimum sample size needed to ...
*Thursday, July 25, 2013 at 8:07am*

**psychology**

15. Maria is a Hispanic female, Natasha is a Black female, and Joan is a White female. Each has a high school level education but no work . Statistics show that ..
A. Natasha will earn less than Maria
B. Joan will earn less than Natasha
...
*Thursday, July 25, 2013 at 7:34am*

**Math Statistics**

Students enrolled in an introductory statistics course at a university were asked to take a survey that indicated whether the student has a visual or verbal learning style. Of the 39 students who took the survey, 25 were judged to have a visual learning style and 14 were ...
*Thursday, July 25, 2013 at 1:09am*

**statistics**

Suppose that the average score on the GMAT exam is 500 and that the standard deviation of all scores is 100 points. You would expect approximately 95% of all GMAT scores to be between
*Wednesday, July 24, 2013 at 5:37pm*

**English.....**

The following passage is taken from an article by a contemporary poet about Clement Clarke Moore, the nineteenth-century writer best known as the author of “A Visit From Saint Nicholas.” If he wasn’t a myth maker himself, at least Clement ...
*Wednesday, July 24, 2013 at 1:16pm*

**Statistics**

Any ideas please? Simple random sample of voters will be taken in a large state. Researchers will construct an approximate 95% confidence interval for the percent of the state¢s voters who will vote for Candidate A. Find the minimum sample size needed to ensure that the ...
*Wednesday, July 24, 2013 at 3:17am*

**STATISTICS**

From a group of 12 people, you randomly select 3 of them. Find the probability that at least one of them is among the 3 oldest people in the group
*Wednesday, July 24, 2013 at 12:34am*

**STATISTICS**

According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. Compute the probability that two randomly selected peanut M&M’s are both blue. If you ...
*Wednesday, July 24, 2013 at 12:34am*

**STATISTICS**

From a group of 12 people, you randomly select 3 of them. Find the probability that at least one of them is among the 3 oldest people in the group
*Wednesday, July 24, 2013 at 12:02am*

**life orientation**

identify and dercribe 3 environmental health hazards that cause ill health,crises,and or disasters within ur community or any other community within s.a and globally.include evidence that is current of the identified issues(e.g graphs and statistics)
*Tuesday, July 23, 2013 at 4:13pm*

**Math Statistics**

3. Suppose 20% of all heart transplant patients do not survive the operation. a. Think about taking repeated random samples of 371 patients from this population. Describe how the sample proportion who die would vary from sample to sample. (Hint: Be sure to refer to the shape, ...
*Monday, July 22, 2013 at 11:50pm*

**statistics**

Suppose that two employees have to be fired from a group of seven: • Amy, female, age 35 • Bob, male, age 41 • Chad, male, age 43 • Diana, female, age 44 • Elvis, male, age 49 • Frank, male, age 61 • Ginger, female, age 62 Determine the ...
*Monday, July 22, 2013 at 11:24pm*

**statistics**

A government researcher wants to conduct a study to determine if there is a correlation between social security numbers and income. He collects the paired data from a random sample of 100 people. Should the methods of this chapter be used with the linear correlation ...
*Monday, July 22, 2013 at 9:39pm*

**Statistics**

True or False Question. I need help please. A sientific paper reports the results of a drug test. This medicine used to reduce vision loss in people suffering from macular degeneration. The article state p = 0,04 section findings. The following issues are of three different ...
*Monday, July 22, 2013 at 4:27am*

**statistics**

1. A simple random sample of 400 students is taken at a large university. The average height of the sampled students is 68 inches and the SD is 2 inches. The distribution of heights in the sample follows the normal curve very closely. An approximate 68% confidence for the ...
*Sunday, July 21, 2013 at 9:42am*

**statistics**

1. A simple random sample of 400 students is taken at a large university. The average height of the sampled students is 68 inches and the SD is 2 inches. The distribution of heights in the sample follows the normal curve very closely. An approximate 68% confidence for the ...
*Sunday, July 21, 2013 at 4:38am*

**Vocabulary**

choose the term that matches the definition. building and construction. a.architecture b. engineering c.nursing d.statistics b
*Saturday, July 20, 2013 at 10:34pm*

**Statistics**

I need help with this please. It is a multiple choice question, so choose one from a,b,c please. I believe the correct is c. What do you think? Ari lives about 10 minutes away from the college to which he intend to attend a summer seminar of 10 weeks. There are two main routes...
*Saturday, July 20, 2013 at 7:46pm*

**Statistics**

I need help with this please. A researcher is designing a research study. He hopes to show that the results of an experiment are statistically significant. What size of p value would take? a) Large value of p b) Small value of p c) The size of the p value does not affect the ...
*Saturday, July 20, 2013 at 6:27am*

**Statistics**

An environmentalist do a study to investigate the effects of a specific herbicide in fish. Has 60 healthy fish and randomly distributes any fish or in the experimental group or the control group. The fish in the experimental group have higher indices enzymes. 1) Suppose that ...
*Friday, July 19, 2013 at 6:44pm*

**Statistics**

A research article reports the results of a drug test. This medicine used to reduce vision loss in people suffering from macular degeneration. The article state p = 0,04 section findings. The following issues are of three different interpretations of this value p. Note which ...
*Friday, July 19, 2013 at 6:42pm*

**Statistics Help !!!!**

Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or different from college ...
*Friday, July 19, 2013 at 2:08am*

**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*

**college statistics**

I am having a bit of trouble with the top half of the questions. I have an answer below for questions 5-10, is there anyway you can check those answers and help me with the rest I am having trouble with. Thank you. 1. The area to the right of 1.93 under Student's t-curve ...
*Thursday, July 18, 2013 at 12:10pm*

**college statistics**

I am having a bit of trouble with some of the questions. Some of the ones I put below have an answer, is there anyway you can check the answer and help me with the rest I am having trouble with. Your sociology teacher claims that 60 percent of American males are married. You ...
*Thursday, July 18, 2013 at 11:58am*

**math-statistics**

The following risk ratios give the increased risk for various diseases comparing two groups (exposed vs. unexposed). a. 2.5 (2.0, 3.0) b. 1.03 (1.02, 1.04) c. 6.0 (.85, 9.8) d. 0.98 (0.88, 1.08) e. 0.20 (.05, 1.05) Which risk ratios are statistically significant at the 0.05 ...
*Wednesday, July 17, 2013 at 7:55am*

**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*

**Vocabulary**

Building and construction A. Architecture B. Engineering C. Nursing D. Statistics im pretty sure its A
*Wednesday, July 17, 2013 at 1:35am*

**statistics**

Do students tend to improve their SAT mathematics (SAT-M) score the second time they take the test/
*Tuesday, July 16, 2013 at 9:01am*

**Statistics**

Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or different from college ...
*Tuesday, July 16, 2013 at 6:19am*

**Statistics**

The effect size in this hypothetical trial (2.7 fewer infections per 1000 vaccinated) is slightly smaller than the effect size found in the real 2009 HIV vaccine trial (2.8 fewer infections per 1000 vaccinated); so why is the p-value smaller? The hypothetical trial has less ...
*Monday, July 15, 2013 at 11:33pm*

**Statistics**

The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1 day at least once in ...
*Monday, July 15, 2013 at 11:31pm*

**statistics**

A hypothetical HIV vaccine trial involving 20,000 participants—10,000 in the vaccine group and 10,000 in the placebo group—had the following results: 6.3 infections per 1000 in the vaccine group and 9.0 infections per 1000 in the placebo group. I ran a computer ...
*Monday, July 15, 2013 at 9:00pm*

**Statistics**

A batch consists of 20 bad apples and 80 good ones. What is the probability of selecting 2 good apples when two are randomly selected if the first selection is replaced before the second is made?
*Monday, July 15, 2013 at 8:10am*

**statistics**

n a survey of 634 males ages 18-64, 392 say that they have gone to the dentist in the past year contrast 90% and 95% confidence intervals for the population proportions, interperate the results and compare withsof the confidence intervals
*Sunday, July 14, 2013 at 9:20pm*

**Statistics Help !! **

Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or different from college ...
*Sunday, July 14, 2013 at 1:03am*

**statistics**

A physician routinely makes physical examinations of children. She is concerned that a three-year-old girl has a height of only 87.8 cm. Heights of three-year-old girls have a mean of 97.5 cm and a standard deviation of 6.9 cm (based on data from the National Health and ...
*Saturday, July 13, 2013 at 10:29pm*

**statistics**

Playing game of chance and pay 300 by rolling a fair die one time if you rome a 2 and receive $1300 if you roll a 4 or six you receive $900 if you ore a 3 5 or 9 receive nothing. find expected value for this game. based on value is it a good game to play?
*Saturday, July 13, 2013 at 12:19am*

**statistics**

participant on tv show picke from lage # applicants with equal number of men and woman .amongst the last 9 participant 7 have been women . if they are picked randomly what is the probability of geting 7 more women when 9 people are picked
*Saturday, July 13, 2013 at 12:16am*

**statistics**

Test consist of 10 multiple choice questions each having 4 possible answers one being correct. you guessed all 10 what is the probability of getting less than 30%
*Saturday, July 13, 2013 at 12:10am*

**statistics**

MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number from 0 to 9, please ...
*Friday, July 12, 2013 at 9:31am*

**statistics**

MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number from 0 to 9, please ...
*Friday, July 12, 2013 at 9:29am*

**Statistics **

Post a null hypothesis that would use a t test statistical analysis.. Use the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA.
*Thursday, July 11, 2013 at 8:29pm*

**statistics**

The same calculus exam has a normal distribution with a mean of 76 and a standard deviation of 6. Find the percentage of students that scored between 65 and 90.
*Thursday, July 11, 2013 at 5:25pm*

**Business Statistics**

You wish to learn the proportion of MBA students that are female within 3%, and with 98% confidence. How large of a sample should you get?
*Thursday, July 11, 2013 at 3:08am*

**Statistics**

1. z test 2. t test for independent samples, and 3. t test for dependent samples Hi! I really need help with this statistics. Its just that you suggest one psychological research question that could be answered by each of the following types of statistical tests above. Im so ...
*Thursday, July 11, 2013 at 1:02am*

**statistics**

Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose a researcher selects a random sample of n=36 male undergraduates and a ...
*Wednesday, July 10, 2013 at 3:02am*

**statistics**

Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a scale from 1 ...
*Tuesday, July 9, 2013 at 9:12pm*

**Statistics**

The following risk ratios give the increased risk for various diseases comparing two groups (exposed vs. unexposed). a. 2.5 (2.0, 3.0) b. 1.03 (1.02, 1.04) c. 6.0 (.85, 9.8) d. 0.98 (0.88, 1.08) e. 0.20 (.05, 1.05) Which risk ratios are statistically significant at the 0.05 ...
*Tuesday, July 9, 2013 at 9:50am*

**statistics**

The respiratory rate per minute in newborns varies according to a distribution that is approximately Normal with mean 50 and standard deviation 5. The proportion of observations from a standard Normal distribution that take values less than 1.15 is about (a) 0.1251. (b) 0.8531...
*Tuesday, July 9, 2013 at 2:02am*

**statistics**

A manufacturer of fishing line claims that by using machines, rather than people, at the assembly plant that this will reduce the amount of defects in the line. Currently the defective rate is 15 per 1000 ft. Which is the correct null hypothesis?
*Tuesday, July 9, 2013 at 1:31am*

**statistics **

A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...
*Monday, July 8, 2013 at 10:19pm*

**statistics **

A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...
*Monday, July 8, 2013 at 10:18pm*

**Statistics!!!**

c. The correlation between number of friends and grade point average (GPA) for 50 adolescents is .37. Is this significant at the .05 level for a two-tailed test?
*Monday, July 8, 2013 at 4:21pm*

**Statistics!!!**

b. The correlation between the number correct on a math test and the time it takes to complete the test is -.45. Test whether this correlation is significant for 80 children at the .05 level of significance. Choose either a one-or two-tailed test and justify your choice.
*Monday, July 8, 2013 at 4:21pm*

**Statistics!!!**

a. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.
*Monday, July 8, 2013 at 4:20pm*

**statistics**

Investment analysts generally believe the interest rate on bonds is inversely related to the prime interest rate for loans; that is bonds perform well when lending rates are down and perform poorly when interest rates are up. Can the bond rate be predicted by the prime ...
*Monday, July 8, 2013 at 12:08pm*

**statistics**

Suppose a researcher gathered survey data from 19 employees and asked the employees to rate their job satisfaction on a scale from 0 to 100 (with 100 being perfectly satisfied). Suppose the following data represent the results of this survey. Assume that relationship with ...
*Monday, July 8, 2013 at 12:04pm*

**statistics**

Shown below are rental and leasing revenue figures for office machinery and equipment in the United States over a sever-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and leasing revenue for the year 2012...
*Monday, July 8, 2013 at 11:53am*

**Statistics**

In the Federal Trade Commission (FTC) \Price Check" study of electronic checkout scanners, the FTC inspected 1,669 scanners at retail stores and supermarkets by scanning a sample of items at each store and determining if the scanned price was accurate. The FTC gives a ...
*Monday, July 8, 2013 at 11:39am*

**Statistics**

How would a histogram change if we increase the number of simulations? A. It would simply be more smooth. B. The p-value would get smaller. C. The standard error would get smaller. D. The distribution would be more similar to a T-distribution.
*Monday, July 8, 2013 at 4:25am*

**Statistics**

The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1 day at least once in ...
*Monday, July 8, 2013 at 4:13am*

**Statistics - Help!**

I really really need help with this. Can someone please look at it and let me know. At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't have a credit card in their own name, ...
*Sunday, July 7, 2013 at 9:33pm*

**Statistics**

Examples please!Create a drawing or plan for a 2 x 3 experimental design that would lend itself to a factorial ANOVA. Be sure to identify the independent and dependent variables.
*Sunday, July 7, 2013 at 8:17pm*

**Statistics**

An analysis of variance was used to evaluate the mean differences from a repeated-measures research study. The results were reported as F(3,24)=6.40. a. How many treatment conditions were compared in the study? b. How many individuals participated in the study?
*Sunday, July 7, 2013 at 8:16pm*

**Statistics**

A researcher reports an F-ratio with df= 2, 12 for a repeated measures of ANOVA. a. How many treatment conditions were compared in the study? b. How many individuals participated in the study?
*Sunday, July 7, 2013 at 8:16pm*

**statistics**

A researcher reports an F-ratio with df= 2, 12 for a repeated measures of ANOVA. How many treatment conditions were compared in the study?
*Sunday, July 7, 2013 at 7:16pm*

**Statistics**

At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't have a credit card in their own name, and 23% reported that they had at least one credit card in their own name and they ...
*Sunday, July 7, 2013 at 3:13pm*

**Statistics/Probability**

3. On a given evening, two roommates, roommate A and roommate B, are arguing over who should control the television remote. Roommate A suggests a game of rock-paper-scissors to settle the dispute. It's the first time that the roommates have played each other in rock-paper-...
*Sunday, July 7, 2013 at 12:15pm*

**Statistics/Probability**

2. Two roommates, roommate X and roommate Y, are expecting company and are arguing over who should have to wash the dishes before the company arrives. Roommate X suggests a game of rock-paper-scissors to settle the dispute. Consider the game of rock-paper-scissors to be a ...
*Sunday, July 7, 2013 at 12:00pm*

**Statistics/Probability**

1. Two roommates, roommate A and roommate B, are about to go cruising with a mutual friend and are arguing over who gets to sit in the front seat. Roommate A suggests a game of rock-paper-scissors to settle the dispute. Consider the game of rock-paper-scissor to be a ...
*Sunday, July 7, 2013 at 11:34am*

**statistics**

According to the local real estate board, the average number of days that homes stay on the market before selling is 78.4 with a standard deviation equal to 11 days. A prospective seller selected a random sample of 36 homes from the multiple listing service. Above what value ...
*Saturday, July 6, 2013 at 1:39pm*

**statistics**

If I know that a set of test scores has a mean of 75 and a standard deviation of 8 what can I conclude?
*Friday, July 5, 2013 at 8:47pm*

**Statistics**

A district mathematics test for all third graders had a normal distribution with a mean of 74 and a standard deviation of 11. What percentage of the third graders tested scored with +1 and -1 standard deviation of the mean?
*Friday, July 5, 2013 at 2:12pm*

**statistics **

1. Are there more broken bones in summer or winter? We get records about the number of fractures treated in January and July at a random sample of 25 emergency rooms. The 95% confidence interval for the mean change ( μd = μJan - μJuly )in the numbers of ...
*Thursday, July 4, 2013 at 3:54pm*

**Statistics**

The distribution of heights of adult American men is approximately normal with a mean of 68 inches and a standard deviation of 2 inches. What percent of mean are at least 72 inches tall?
*Thursday, July 4, 2013 at 3:02pm*

**statistics **

The makers of the MAGNETIZER Engine Energizer System (EES) claim that it improves gas mileage and reduces emissions in automobiles by using magnetic free energy to increase the amount of oxygen in the fuel for greater combustion efficiency. Following are test results, ...
*Thursday, July 4, 2013 at 1:07pm*

**statistics**

population with a mean of 110 and a standard deviation of 6, what is the likelihood of a score of 100 or lower
*Thursday, July 4, 2013 at 12:31am*

**statistics**

There is a table of AVERAGE monthly temperatures of two different areas of the same city. A scatterplot of the data is made to show that the relationship is linear between the two. If raw data was used instead of the averages to make the scatterplot, the correlation ...
*Wednesday, July 3, 2013 at 10:36pm*

**statistics **

A new medication has been created to treat osteo-arthritis inflammation and pain. Doctors prescribing the drug claim that the drug is not as effective for women as men since women taking the medication have higher pain levels than men. The pharmaceutical company conducts a ...
*Wednesday, July 3, 2013 at 11:55am*

**graduate statistics**

Does computer-assisted instruction help community college health students with reading difficulties to learn reading skills at a faster than normal rate? A researcher arranged for one of these students to have access to a set of computer-learning programs instead of the normal...
*Wednesday, July 3, 2013 at 10:18am*

**graduate statistics**

Do children from lower socioeconomic status (SES) neighborhoods have lower than average test-taking skills? A researcher administered a standard measure of test-taking skills to a randomly chosen child from a low SES neighborhood and found him to have a score of 38. The ...
*Wednesday, July 3, 2013 at 10:17am*

**graduate statistics**

A nursing professor was curious as to whether the students in a very large class she was teaching who turned in their tests first scored differently from the overall mean on the test. The overall mean score on the test was 75 with a standard deviation of 10; the scores were ...
*Wednesday, July 3, 2013 at 10:17am*

**Statistics**

A test is made of H0: mean = 27 versus H1: mean < 27. The true value of the mean is 27, and H0 is rejected. Is this a Type I error, Type II error, or a correct decision? How do I determine which is which??? Question 4 options: 1) Type II error 2) Type I error 3) Correct ...
*Tuesday, July 2, 2013 at 7:30pm*

**Statistics**

Siegel found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who didn’t own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (...
*Tuesday, July 2, 2013 at 6:19pm*

**Statistics **

Two dice are tossed. What is the probability that the sum of both dice is a prime number? This is what I have so far Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any given roll: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12...
*Tuesday, July 2, 2013 at 4:31pm*

**statistics**

population mean of 110 and SD of 6, what is likelihood of having score of 100 0r lower
*Tuesday, July 2, 2013 at 1:55pm*

**Statistics**

In a recent year, Delaware had the highest per capita annual income with $51,803. If o=$4850, find the mean X that falls at the 95th percentile for a sample of 35 residents.
*Tuesday, July 2, 2013 at 10:25am*

**statistics**

how to caculate using a ruler to measure the thickness of a 25 pages in a textbook
*Tuesday, July 2, 2013 at 1:04am*

**statistics**

how to caculate using a ruler to measure the thickness of a 25 pages in a textbook
*Tuesday, July 2, 2013 at 1:04am*

**Statistics**

A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 692 hours with a sample standard deviation of 30 hours. It is reasonable to believe that the population is approximately ...
*Monday, July 1, 2013 at 7:01pm*

**Statistics**

What critical value for z would be used to test the hypotheses: H0:μ≤10 and Ha:μ>10, for α = 0.05 ?
*Monday, July 1, 2013 at 3:06pm*

**statistics**

A senator asks his constituents to rank seven issues in order of importance. How many rankings are possible?
*Monday, July 1, 2013 at 12:28pm*

**statistics**

Assuming SAT score data are normally distributed, if only the top 25% of students based on SAT scores qualify to be interviewed for a particular school what would be the minimum score required to have to be interviewed if the population mean is a 1509 and the standard ...
*Monday, July 1, 2013 at 7:01am*

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