One teacher at a school wants to estimate the average amount of time students take to get from one class to the next. Taking a random sample of 210 students, he finds that the sample average for this travel time is 4.6 minutes. (a) If it can be presumed from experience that σ = 1:40 minutes, find a 98% confidence interval for the population mean µ. (b) What is the margin of error for this 98% confidence interval?
One teacher at a school wants to estimate the average amount of time students take to get from one class to the next. Taking a random sample of 210 students, he finds that the sample average for this travel time is 4.6 minutes. (a) If it can be presumed from experience that σ = 1:40 minutes, find a 98% confidence interval for the population mean µ. (b) What is the margin of error for this 98% confidence interval?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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One teacher at a school wants to estimate the average amount of time students take to get from one class to the next. Taking a random sample of 210 students, he finds that the sample average for this travel time is 4.6 minutes.
(a) If it can be presumed from experience that σ = 1:40 minutes, find a 98%
confidence interval for the population mean µ.
(b) What is the margin of error for this 98% confidence interval?
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