Asoccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.05 in.
(a) determine the minimum sample size required to construct a 99% confidence interval for the population mean. assume the population standard deviation is 0.20 in.
(b) repeat part (a) using a standard deviation of 0.40 in. which standard deviation requires a larger sample size? explain.
(a) the minimum sample size required to construct a 99% confidence interval using a population standard deviation of 0.20 in. is balls. (round up to the nearest integer.)
(b) the minimum sample size required to construct a 99% confidence interval using a standard deviation of 0.40 in. is balls. (round up to the nearest integer.)
a population standard deviation of in. requires a larger sample size. due to the increased variability in the population, a sample size is needed to ensure the desired accuracy.

107,426, bigger

Step-by-step explanation:

Given that a soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.05 in.

Margin of error = 0.05 inches

Since population std deviation is known we can use z critical value.

(a) i.e. for 99% confidence interval

Z critical = 2.58

A minimum sample size of 107 needed.

b)

Here minimum sample size = 426

Due to the increased variability in the population, a bigger sample size is needed to ensure the desired accuracy.

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step-by-step explanation:

we'll this would mean that the dunk tank and the bounce house are the same for 20 hours because the 2 represents that the two activities, and the 20 represents the amount of hours they both are. so with this said, it means that the answer is c. the costs for a dunk tank and bounce house are the same for 20 hours.

c.the costs for a dunk tank and bounce house are the same for 20 hours.

hope this .