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Name: A researcher is interested in finding a 95% confidence interval for th
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Description: A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 135 students who averaged 33.7 minutes concentrating on

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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A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 135 students who averaged 33.7 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.5 minutes. Round answers to 3 decimal places where possible.

a. To compute the confidence interval use a ? z t distribution.

b. With 95% confidence the population mean minutes of concentration is between ____ and ____ minutes.

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