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It is suspected that a supplier systematically underfills a certain brand of detergent canisters. A small sample of n = 15 canisters is measured | exactly. This shows that the canisters contain on average X = 4947.2 ml and the sample standard deviation S = 31.6 ml. a. Determine an 80% confidence interval for the average contents of a canister. Give your answers to two decimal places. i. The lower confidence bound is: ii. The upper confidence bound is:

It is suspected that a supplier systematically underfills a certain brand of detergent canisters. A small sample of n = 15 canisters is measured | exactly. This shows that the canisters contain on average X = 4947.2 ml and the sample standard deviation S = 31.6 ml. a. Determine an 80% confidence interval for the average contents of a canister. Give your answers to two decimal places. i. The lower confidence bound is: ii. The upper confidence bound is:

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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It is suspected that a supplier systematically underfills a certain brand of detergent canisters. A small sample of n 15 canisters is measured exactly. This shows that the canisters contain on average X = 4947.2 ml and the sample standard deviation S = 31.6 ml. a. Determine an 80% confidence interval for the average contents of a canister. Give your answers to two decimal places. i. The lower confidence bound is: ii. The upper confidence bound is: b. What is the smallest sample size n necessary to obtain an interval width of 22 for a confidence level of 98%? Round your answer up to the nearest whole number.
Transcribed Image Text:It is suspected that a supplier systematically underfills a certain brand of detergent canisters. A small sample of n 15 canisters is measured exactly. This shows that the canisters contain on average X = 4947.2 ml and the sample standard deviation S = 31.6 ml. a. Determine an 80% confidence interval for the average contents of a canister. Give your answers to two decimal places. i. The lower confidence bound is: ii. The upper confidence bound is: b. What is the smallest sample size n necessary to obtain an interval width of 22 for a confidence level of 98%? Round your answer up to the nearest whole number.
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