The daily sales of Hi-White toothpaste are believed to be approximately normally distributed. For a random sample of 21 days, the standard deviation sales turned out to be 18.23 tubes. Find the crtical value that corresponds to the confidence interval if the margin of error is 7.29. Round your answer to three decimal places.
The daily sales of Hi-White toothpaste are believed to be approximately normally distributed. For a random sample of 21 days, the standard deviation sales turned out to be 18.23 tubes. Find the crtical value that corresponds to the confidence interval if the margin of error is 7.29. Round your answer to three decimal places.
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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