Last year a sample of US adults showed that 12% went shopping on Thanksgiving Day. This year, a group wants to make a 90% confidence interval of all US adults that are going shopping this year. The groups wants the margin of error to be 2.5%. Enter your answers as whole numbers. (a) What is the minimum sample size required to obtain this type of accuracy? Use the prior year's sample proportion in your calculation. The minimum sample size is U.S. adults. (b) What is the minimum sample size required to obtain this type of accuracy when you assume no prior knowledge of the sample proportion? The minimum sample size is U.S. adults.
Last year a sample of US adults showed that 12% went shopping on Thanksgiving Day. This year, a group wants to make a 90% confidence interval of all US adults that are going shopping this year. The groups wants the margin of error to be 2.5%. Enter your answers as whole numbers. (a) What is the minimum sample size required to obtain this type of accuracy? Use the prior year's sample proportion in your calculation. The minimum sample size is U.S. adults. (b) What is the minimum sample size required to obtain this type of accuracy when you assume no prior knowledge of the sample proportion? The minimum sample size is U.S. adults.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Last year a sample of US adults showed that 12% went shopping on Thanksgiving Day. This year, a group wants to make a 90% confidence interval of all US adults that are going shopping this year. The groups wants the margin of error to be 2.5%. Enter your answers as whole numbers. (a) What is the minimum sample size required to obtain this type of accuracy? Use the prior year's sample proportion in your calculation. The minimum sample size is U.S. adults. (b) What is the minimum sample size required to obtain this type of accuracy when you assume no prior knowledge of the sample proportion? The minimum sample size is U.S. adults.
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