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Name: Suppose that the average time spent per day with digital media several
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Description: Suppose that the average time spent per day with digital media several years ago was 3 hours and 16 minutes. For last year, a random sample of 20 adults in a certain region spent the numbers of hours per day with digital media given in the accompany

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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Suppose that the average time spent per day with digital media several years ago was 3 hours and 16 minutes. For last year, a random sample of 20 adults in a certain region spent the numbers of hours per day with digital media given in the accompanying table. Preliminary data analyses indicate that the t-interval procedure can reasonably be applied. Find and interpret a 99% confidence interval for last year's mean time spent per day with digital media by adults of the region. (Note: x=5.64 hr and s=2.25hr.)

1
Digital Media Times
1.9
5.6
6.5
4.7
5.9
2.8
7.2
2.7
8.3
9.8
7.5
6.1
9.8
4.4
3.5
3.4
5.5
5.3
4.4
7.4
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