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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:

MATLAB: An Introduction with Applications
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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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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