A major tire manufacturer wishes to estimate the mean tread life in miles for one of its tires. it wishes to develop a confidence interval estimate that would have a maximum sampling error of 500 miles with 90 percent confidence. a pilot sample of n=50 tires showed a sample standard deviation equal to 4,000 miles. based on this information, what is the required sample size?
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Answer:
A major tire manufacturer wishes to estimate the mean tread life in miles for one of its tires. it wishes to develop a confidence interval estimate that would have a maximum sampling error of 500 miles with 90 percent confidence. a pilot sample of n=50 tires showed a sample standard deviation equal to 4,000 miles. based on this information, what is the required sample size?
Explanation:
A major tire manufacturer wishes to estimate the mean tread life in miles for one of its tires. it wishes to develop a confidence interval estimate that would have a maximum sampling error of 500 miles with 90 percent confidence. a pilot sample of n=50 tires showed a sample standard deviation equal to 4,000 miles. based on this information, what is the required sample size?A major tire manufacturer wishes to estimate the mean tread life in miles for one of its tires. it wishes to develop a confidence interval estimate that would have a maximum sampling error of 500 miles with 90 percent confidence. a pilot sample of n=50 tires showed a sample standard deviation equal to 4,000 miles. based on this information, what is the required sample size?