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Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 95% confident that the sample standard deviation s is within 20% of o. Is this sample size practical? To be 95% confident that s is within of the value of 6, the sample size n should be at least To be 99% confident that s is within of the value of 6, the sample size n should be at least The minimum sample size needed is 1% 5% 10% 20% 30% 40% 50% 19,205 768 192 48 21 12 8 1% 5% 33,218 1,336 336 85 38 22 14 10% 20% 30% 40% 50%

Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 95% confident that the sample standard deviation s is within 20% of o. Is this sample size practical? To be 95% confident that s is within of the value of 6, the sample size n should be at least To be 99% confident that s is within of the value of 6, the sample size n should be at least The minimum sample size needed is 1% 5% 10% 20% 30% 40% 50% 19,205 768 192 48 21 12 8 1% 5% 33,218 1,336 336 85 38 22 14 10% 20% 30% 40% 50%

College Algebra (MindTap Course List)
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 39E: Assume that the probability that an airplane engine will fail during a torture test is 12and that...
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Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 95% confident that the sample standard deviations is within 20% of o. Is this sample size practical? 6 To be 95% confident that s is within of the value of o, the sample size n should be at least To be 99% confident that s is within of the value of 6, the sample size In should be at least The minimum sample size needed is 1% 5% 19,205 768 10% 20% 30% 40% 50% 192 48 21 12 8 1% 5% 10% 20% 30% 40% 50% 33,218 1,336 336 85 38 22 14
Transcribed Image Text:Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 95% confident that the sample standard deviations is within 20% of o. Is this sample size practical? 6 To be 95% confident that s is within of the value of o, the sample size n should be at least To be 99% confident that s is within of the value of 6, the sample size In should be at least The minimum sample size needed is 1% 5% 19,205 768 10% 20% 30% 40% 50% 192 48 21 12 8 1% 5% 10% 20% 30% 40% 50% 33,218 1,336 336 85 38 22 14
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