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A population has standard deviation o = 17.7. Part 1 of 2 (a) How large a sample must be drawn so that a 99.9% confidence interval for u will have a margin of error equal to 3.8? Round the critical value to no less than three decimal places. Round the sample size up to the nearest integer. A sample size of is needed to be drawn in order to obtain a 99.9% confidence interval with a margin of error equal to 3.8. Part 2 of 2 (b) If the required confidence level were 98%, would the necessary sample size be larger or smaller? because the confidence level is (Choose one) higher lower (Choose one) ▼

A population has standard deviation o = 17.7. Part 1 of 2 (a) How large a sample must be drawn so that a 99.9% confidence interval for u will have a margin of error equal to 3.8? Round the critical value to no less than three decimal places. Round the sample size up to the nearest integer. A sample size of is needed to be drawn in order to obtain a 99.9% confidence interval with a margin of error equal to 3.8. Part 2 of 2 (b) If the required confidence level were 98%, would the necessary sample size be larger or smaller? because the confidence level is (Choose one) higher lower (Choose one) ▼

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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A population has standard deviation o = 17.7. Part 1 of 2 (a) How large a sample must be drawn so that a 99.9% confidence interval for u will have a margin of error equal to 3.8? Round the critical value to no less than three decimal places. Round the sample size up to the nearest integer. A sample size of is needed to be drawn in order to obtain a 99.9% confidence interval alo with a margin of error equal to 3.8. Part 2 of 2 (b) If the required confidence level were 98%, would the necessary sample size be larger or smaller? v, because the confidence level is (Choose one) ▼ (Choose one) ▼ higher lower ll
Transcribed Image Text:A population has standard deviation o = 17.7. Part 1 of 2 (a) How large a sample must be drawn so that a 99.9% confidence interval for u will have a margin of error equal to 3.8? Round the critical value to no less than three decimal places. Round the sample size up to the nearest integer. A sample size of is needed to be drawn in order to obtain a 99.9% confidence interval alo with a margin of error equal to 3.8. Part 2 of 2 (b) If the required confidence level were 98%, would the necessary sample size be larger or smaller? v, because the confidence level is (Choose one) ▼ (Choose one) ▼ higher lower ll
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