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April 25, 2014

Search: Statistics: Sample Size, Variance and Standard Dev

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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

Research and Statistics
What factors influence the size of the t-statistics( mean difference, variance, sample size) and which way?
Monday, February 10, 2014 at 1:47pm by Erica

statistics
Suppose we take a random sample of size n from a normal population with variance, σ2 . It can be shown that (n−1)s2/σ2 has a chi-square distribution with n−1 degrees of freedom, where s is the sample variance. Below is a random sample of size 8 drawn from...
Monday, March 18, 2013 at 12:32am by sandy

statistics
A random sample of n=16 scores is obtained from a population with a mean of = 80 and a treatment is administered to the sample. After treatment, the sample mean is found to be M=82. a)Assuming the sample contained n=16 individuals, measure the size of the treatment effect by ...
Wednesday, March 5, 2008 at 12:30am by Laurie

business statistics
A random sample of size 15 taken from a normally distributed population reveled a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal?
Saturday, August 1, 2009 at 11:27am by Samantta

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

statistics
Let X be the average of a sample of size 25 independent normal random variables with mean 0 and variance 1. P[[X<c]=0.5 (a) Determine c such that (b) Now assume that the observations may not be normally distributed, but they still are independent with mean 0 and variance 1...
Wednesday, November 23, 2011 at 11:17am by zwesko

Statistics
A normal population has an expected value of 60 and a variance of 30. Use the central limit theorem to determine what the sample size should be such that the mean has a probability of 90% to fall between the values 58 and 62. One concept of the Central Limit Theorem is ...
Thursday, August 10, 2006 at 2:06am by ruth

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

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

Statistics
An IQ test is designed so that the mean is 100 and the standard deviation is 19 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95% confidence that the sample mean is within ...
Wednesday, February 12, 2014 at 10:12pm by Stephanie

Statistics
Suppose that the fit to the simple linear regression of Y on X from 6 observations produces the following residuals: -3.3, 2.1, -4.0, -1.5, 5.1, 1.6. a) What is the estimate of sigma squared? b) What is the estimate of sigma? c) What are the degrees of freedom? Sigma = ...
Wednesday, March 14, 2007 at 7:39pm by MMK

Statistics
SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. Using the formula for σM, what will σM be when a. the sample size is 25 b. the sample size is 121, and c. the sample size is 400?
Monday, November 18, 2013 at 8:04pm by Mikos

elementary statistics
A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be conculded that the variance...
Saturday, November 30, 2013 at 7:44pm by David

elementary statistics
A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be conculded that the variance...
Saturday, November 30, 2013 at 10:30pm by David

statistics
Lets assume you have taken 100 samples of size 36 each from a normally distributed population. Calculate the standard deviation of the sample means if the populations variance is 25.
Sunday, June 13, 2010 at 6:30pm by Anonymous

statistics
Scores on a certain test are normally distributed with a variance of 14. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure with 95% confidence that the sample mean will not differ from the population mean ...
Monday, September 13, 2010 at 7:58pm by Sarah

statistics
Scores on a certain test are normally distributed with a variance of 91. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure with 95.44 percent confidence that the sample mean will not differ from the ...
Saturday, June 25, 2011 at 9:15pm by vina

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

statistics
Determine the sample size required to estimate a population proportion to within 0.032 with 95.7% confidence, assuming that you have no knowledge of the approximate value of the sample proportion. Sample Size = B. Repeat part the previous problem, but now with the knowledge ...
Saturday, March 28, 2009 at 10:58pm by Joey

statistics
A population is normally distributed with mean 30, population SD =10, Sample size 25. What are the mean and variance of the distribution of means, respectively?
Thursday, February 20, 2014 at 10:35pm by Keith

statistics
Which of the following criteria must be met to do a one-sample test for a proportion? A. The data values in the sample must be independent. B. The parent population must be normally distributed. C. The data must come from a random sample. D. The sample size must be more than ...
Thursday, June 27, 2013 at 6:34pm by Katie

statistics
A psychologist wants to estimate the variance of employee test scores. A random sample of 18 scores had a sample standard deviation 10.4. Find a 90% confidence 2 interval for the population variance. What assumption, if any, have you made in calculating this interval estimate?
Wednesday, November 9, 2011 at 9:21am by Janelle

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
Exam Grades. A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below.) At = 0.05, can it be concluded that the ...
Wednesday, April 17, 2013 at 2:37pm by Gabriela

Statistics
To do inferential procedures comparing two proportions, we need another variance formula (our ruler). This formula is based on what principle? A) The variance of the difference of two statistics is the difference of the variances of each statistic. B) The variance of the ...
Friday, November 15, 2013 at 7:30pm by Katie

Statistics
Use a x squared-test to test the claim about the population variance or standard deviation at the given level of significance and using the given sample statistics. Claim: ơ2 ≤ 60; α = 0.025. Sample statistics: s2 = 72.7, n = 15
Wednesday, December 26, 2007 at 5:00pm by Brandon

Statistics
Use a chi-squared test to test the claim about the population variance or standard deviation at the given level of significance and using the given sample statistics. Claim: ơ2 ≤ 60; α = 0.025. Sample statistics: s2 = 72.7, n = 15
Thursday, December 27, 2007 at 11:37am by Brandon

Statistics
Which of the following criteria must be met to do a one-proportion z- test? A. The data values in the sample must be dependent. B. The parent population must be normally distributed. C. The data must come from a random sample. D. The sample size must be more than 10% of the ...
Tuesday, October 29, 2013 at 4:31pm by Penny

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

Statistics
A study of generator related carbon monoxide deaths showed that a sample of 6 recent years had a variance of 16.8 deaths per year. Find the 99% confidence interval of the true variance
Saturday, August 10, 2013 at 9:55am by Elise

statistics
find the sample variance s2 for the following sample data. Round to the nearest hundred x: 23 17 12 35 29
Thursday, July 22, 2010 at 3:22pm by Anonymous

Statistics
Which of these statements is not true about the variance in a binomial distribution B(n, p)? __________ A. For a fixed p, the variance increases as n increases. B. For a fixed n, the variance is maximum when p = 0.5. C. The variance depends only on n. D. The variance is ...
Saturday, March 24, 2012 at 4:00pm by Anonymous

statistics
Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29
Friday, August 20, 2010 at 11:27am by karen

statistics
Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29
Sunday, October 3, 2010 at 11:23pm by Stefania

statistics
Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29
Friday, January 7, 2011 at 10:21pm by blueyeshadow

Intro to Statistics
A sample has n = 9 scores and an SS = 216. What is the variance for this sample?
Tuesday, April 19, 2011 at 1:00am by Cristina

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 random sample of n = 30 is drawn from a population that is normally distributed, and the sample variance is s = 41.5. Use = 0.05 in testing ₀ : = 29.0 versus ǩ : 29.0
Wednesday, August 12, 2009 at 4:05pm by Marianne

statistics
Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29 a. 84.20 b. 67.36 c. 101.00 d. 88.84 e. 126.25
Friday, August 20, 2010 at 12:43pm by karen

Statistics
In a study to estimate a population mean, i start with a sample size 10 and calculate the 95% confidence interval. Suppose i am not satisfied with the size of the confidence interval and want to reduce it by half. Give an estimate of sample size that i need.
Monday, August 23, 2010 at 6:18pm by Zodra

statistics
A random sample of 10 observations has been drawn from a normal population, and the sample variance is found to be s = 19.5. Determine the 98% confidence interval for .
Wednesday, August 12, 2009 at 10:37pm by Laura

statistics
A random sample of n= 12 is drawn from a population that is normally distributed, and the sample variance is s = 19.3. Use = 0.025 in testing ₀ : 9.4 versus ǩ : > 9.4
Wednesday, August 12, 2009 at 10:38pm by Yadira M

Statistics
A credit manager has chosen a sample of size 2,164 to estimate the mean balance of credit accounts to within $0.50. A pilot study of 50 accounts had a mean of $1,219 and a variance of 100. The level of confidence of the interval is: 90% 95% 98% 99%
Saturday, November 16, 2013 at 7:11pm by Cam

Statistics
A credit manager has chosen a sample of size 2,164 to estimate the mean balance of credit accounts to within $0.50. A pilot study of 50 accounts had a mean of $1,219 and a variance of 100. The level of confidence of the interval is: 90% ? 95% ? 98% ? 99% ?
Sunday, November 17, 2013 at 12:25pm by Em'

Statistics
If the population is normally distribution then the sample must be normally distributed even for small sample size? True or False. The variance of the standard normal distribution is always equal to 1.? True or False. A continuous random variable may not be normally ...
Friday, February 7, 2014 at 4:25pm by Jamie

statistics
A researcher is testing a null hypothesis that states: H: = 50. A sample of 25 scores is selected and the mean is M = 55.Assuming that the sample variance is s2 = 100, compute the estimated standard error and the t statistic. Is this sample sufficient to reject the null ...
Friday, April 15, 2011 at 7:57pm by kesha

Statistics
Kind attention Psydag: A random sample of size 20 from a normal population with sample mean 42 and sample standard deviation of 6 . To test the hypothesis the population mean 44 at 5% level of significance , find the p-value and comment Clarification: The sample size is 20 ...
Friday, January 1, 2010 at 8:37am by Mrs. Lakshmi

Statistics
In an analysis of variance, if the null hypothesis is true then: - The research hypothesis is also true -You will need fewer participants for the experiment - There is less variance among the sample means than if the null hypothesis was not true - The within-group estimate of ...
Sunday, October 11, 2009 at 10:07am by Trey

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
Hi, My professor gave us the formulas for sample variance and population variance, as well as the shortcut formulas for each. However, he said that on some of the problems, we will HAVE to use the long formula, which for population variance would be: E(x-mean)^2/N Can someone ...
Monday, October 11, 2010 at 8:47pm by Lila

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

statistics
IQ scores are normally distributed with a mean of 105 and a standard deviation of 18. Assume that many samples of size n are taken form a large population of people and the mean IQ score is computed for each sample. If the sample size is n=64, find the mean and standard ...
Thursday, September 13, 2012 at 3:51pm by kimberly

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

statistics
Describe a process you could use to get a simple random sample of size 20 from a class of size 40
Monday, April 30, 2012 at 12:21am by kmccraney

Statistics
All else equal will the confidence intervals for samples of size 80 be longer or shorter than those for sample of size 40?
Monday, November 26, 2012 at 11:03pm by Emily

statistics
What is the value for for a 95% confidence interval for the sample variance when n=10?
Wednesday, August 25, 2010 at 4:21am by damian

statistics
A transportation company wants to estimate the variance of the length of time goods are in transit across the country. A random sample of 20 shipments gives days and day. Give a 95% confidence interval for the variance of the transit time for all goods.
Monday, May 17, 2010 at 5:28pm by ak

Quantitative Analysis
The "standard deviation of the sample score" divided by the "square root of the sample size" is the formula for computing the ...? A. Coefficiant of Determination B. Absolute Deviation C. Variance D. Standard Error
Wednesday, November 6, 2013 at 3:14pm by Stacie

Statistics
The confidence interval below for the population variance is based on the following sample statistics: n = 25, x-bar = 31.1, and s = 4.2. 9.29 < standard deviation squared < 42.82 What is the degree of confidence?
Sunday, July 22, 2012 at 6:52pm by Ann

statistics
Suppose a random sample of size 50 is selected from a population with σ = 10. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The population size is infinite (to 2 decimals). ...
Monday, April 14, 2014 at 5:14pm by Vanessa

statistics
Suppose a random sample of size 50 is selected from a population with σ = 10. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The population size is infinite (to 2 decimals). ...
Tuesday, April 15, 2014 at 10:00pm by Vanessa

statistics
An independent-measures study with n = 6 in each sample, produces a sample mean difference of 4 points and a pooled variance of 12. What is the value for the t statistic? a. 1 b. 2 c. 4/√2 d. 4/√8
Saturday, November 10, 2012 at 7:05pm by Robbie

statistics
An independent-measures study with n = 6 in each sample, produces a sample mean difference of 4 points and a pooled variance of 12. What is the value for the t statistic? a. 1 b. 2 c. 4/√2 d. 4/√8
Sunday, November 11, 2012 at 9:13pm by Robbie

statistics
You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 5 and a population standard deviation 1 and a sample size of 4. Machine 2 has a sample mean of 8 and a population standard deviation of 2 with a sample size of 4. ...
Monday, October 11, 2010 at 10:39pm by Anonymous

Statistics
Comcast wants to know the percent of their cable subscribers who use the internet at home. How large of a sample size should they survey to determine the proportion who use the internet within 2% and with 90% confidence interval. Please show formula when computing sample size.
Tuesday, January 26, 2010 at 9:42am by Bryant

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

math
A sample of size 100 is taken resulting in a standard deviation of 3. Construct a 95% confidence interval for the population variance.
Wednesday, May 8, 2013 at 11:28pm by Jewelz

Statistics
You are getting ready to take a sample from a large population, and need to determine the appropriate sample size. You are estimating sales at a large chain of department stores. A previous survey from the same population found a standard deviation of $18. What sample size is ...
Monday, July 16, 2012 at 12:29pm by Devika

statistics
Briefly explain how increasing sample size influences each of the following. Assume that all other factors are held constant. a. The size of the z- score in a hypothesis test. b. The size of Cohens d. c. The power of a hypothesis test.
Friday, March 18, 2011 at 11:48pm by Melissa Williams

Statistics
Suppose X1;X2;...;X5 is a random sample from a n(0; variance) distribution. define U = X1+X2+X3+X4; V = (X2)^2+(X3)^2+(X4)^2+(X5)^2 and W = U/sqrtV. (a) Name the distribution of U/4 and V/(variance) and give the values of their parameters. (b) (i) Compute k such that kW has a ...
Thursday, August 10, 2006 at 2:04am by ruth

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

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

statistics
The sample mean to be calculated from a random sample of size n= 4 from a population consists of eight measurements (2, 6, 9, 12, 25, 29, 39, 50) . find the sampling distribution of y .(Hint : there are 70 samples of size 4 when sampling from a population of eight measurements )
Sunday, November 14, 2010 at 1:18am by koky

Statistics
Given the population: 0,0,0,0,1,1,1,1,1,1 If a sample size of 6 was taken at random with replacement, what is the probability that the sample mean is 4/6?
Tuesday, December 14, 2010 at 3:28am by Chelsea

statistics
for the population consisting of four abservations 1,3,5,7, find the dampling distribution of the sample mean for sample size n=2
Tuesday, June 19, 2012 at 4:53pm by Anonymous

statistics
The Democrat and Chronicle reported that 25% of the flights arriving at the San Diego airport during the first five months of 2001 were late (Democrat and Chronicle, July 23, 2001). Assume the population proportion is p = .25. 1. Calculate () with a sample size of 1,200 ...
Monday, October 19, 2009 at 10:13pm by jessica knowes

statistics college
find the range standard deviation and variance for following sample data 2,11,81,29,22,59,78,71,21,43,99,12,38,74,56,81
Tuesday, May 22, 2012 at 9:47pm by melba

statistics
Calculate the variance version of standard error for each sample in Exercise 10.18for the liberals (2, 1, 3, 2) and then for the conservatives (4, 3, 3, 5, 2, 4).
Wednesday, September 26, 2012 at 8:51pm by susan

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
7. Determine whether it is appropriate to apply the Central Limit Theorem for Proportions: sample size 35, sample proportion 0.95. A) Yes B) No
Wednesday, May 8, 2013 at 3:39pm by ali awan

statistics
1. A random sample of size 49 is taken from a large population, measuring the time it takes to complete a drivers 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 drivers 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

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

statistics
The sample mean for a recent introductory psychology test was 78, and the sample variance was 9. If a student received a score of 82, what was this students z-score?
Friday, April 19, 2013 at 2:36pm by jenn

statistics
Let X be the average of a sample of 16 independent normal random variables with mean 0 and variance 1. Determine c such that P (X< c) = .5
Wednesday, March 9, 2011 at 12:07am by Anonymous

statistics
2. Assume that the population proportion of adults having a college degree is 0.35. A random sample of 200 adults is to be selected to test this claim. A) What is the shape, mean, and standard deviation of the sampling distribution of the sample proportion for samples of size ...
Tuesday, August 17, 2010 at 2:18pm by Natasha

stats
Consider an infinite population with 25% of the elements having the value 1, 25% the value 2, 25% the value 3, and 25% the value 4. If X is the value of a randomly selected item, then X is a discrete random variable whose possible values are 1, 2, 3, and 4. (a) Find the ...
Wednesday, November 5, 2008 at 8:40pm by Mischa

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

Statistics
A new manager, hired at a large warehouse, was told to reduce the 26% employee sick leave. The manager introduced a new incentive program for the company's employees with perfect attendance. The manager decides to test the new program to see if it's better and plans to use a ...
Tuesday, October 29, 2013 at 4:32pm by Penny

statistics
A 99% confidence interval for population variance is being formulated based on a sample of 16 observations. What are appropriate values for X^2
Sunday, March 13, 2011 at 11:36pm by Sandy

statistics 251
how do i find the standard deviation and sample variance for $7448, $4911, $9051, $6374, $4227
Thursday, September 13, 2012 at 6:21pm by amirah

statistics
A 95% confidence interval for a population mean was reported to be 23,100 to 24,900. If the sample standard deviation is 5,808.26, what sample size was used in this study?
Sunday, June 5, 2011 at 1:25pm by Anige

Statistics
A 82% confidence interval for a sampling distribution with a mean of 100, a sample standard deviation of 24 and a sample size of 36 will be based on a = ______ and a corresponding Z of ___
Monday, March 5, 2012 at 3:48am by Jeff

Statistics
A 82% confidence interval for a sampling distribution with a mean of 100, a sample standard deviation of 24 and a sample size of 36 will be based on a = ______ and a corresponding Z of ___
Monday, March 5, 2012 at 3:49am by Jeff

Statistics
A study in Orlando, Florida claimed that the mean commute time for all employees working at Disney exceeds 40 minutes. This figure is higher than what was assumed in the past. The plan is to test this claim at a level of significance = 0.05 and a sample size = 100 commuters. ...
Wednesday, April 4, 2012 at 4:38pm by Amy

statistics
Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 344 with 96 successes at a confidence level of 98%.
Sunday, July 22, 2012 at 9:15pm by robyn

statistics t test
how to know exact t value using sample standard deviation and sample mean and sample size i think df is sample size -1 . we usually use approx value but to use exact value how to use t score table. and how we conclude whether it is two tailed test or one tailed test . (i f the...
Sunday, July 18, 2010 at 10:03pm by Anonymous

Statistics
A random sample of size 20 from a normal population will sample mean 42 and sample standard deviation of 6 . To test the hypothesis the population mean 44 at 5% level of significance , find the p-value and comment
Thursday, December 31, 2009 at 5:07am by Mrs. Lakshmi

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