Homework SourseA soccer ball manufacturer wants to estimate the mean circum
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in.
(a) determine the minimum sample size required to construct a 95% confidence interval for the population mean, assuming the population standard deviation is 0.25 in.
(b) determine the minimum sample size required to construct a 95% confidence interval for the population mean, assuming the population standard deviation is 0.30 in.
(c) determine the minimum sample size required to construct a 99% confidence interval for the population mean, assuming the population standard deviation is 0.25 in.
(d) based on the answers found above, describe how the population standard deviation affects the minimum sample size.
(e) based on the answers found above, describe how the confidence level affects the minimum sample size.
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in.
(a) determine the minimum sample size required to construct a 95% confidence interval for the population mean, assuming the population standard deviation is 0.25 in.
(b) determine the minimum sample size required to construct a 95% confidence interval for the population mean, assuming the population standard deviation is 0.30 in.
(c) determine the minimum sample size required to construct a 99% confidence interval for the population mean, assuming the population standard deviation is 0.25 in.
(d) based on the answers found above, describe how the population standard deviation affects the minimum sample size.
(e) based on the answers found above, describe how the confidence level affects the minimum sample size.
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in.
(a) determine the minimum sample size required to construct a 95% confidence interval for the population mean, assuming the population standard deviation is 0.25 in.
(b) determine the minimum sample size required to construct a 95% confidence interval for the population mean, assuming the population standard deviation is 0.30 in.
(c) determine the minimum sample size required to construct a 99% confidence interval for the population mean, assuming the population standard deviation is 0.25 in.
(d) based on the answers found above, describe how the population standard deviation affects the minimum sample size.
(e) based on the answers found above, describe how the confidence level affects the minimum sample size.
Solution
