Suppose that the average time spent per day with digital media several years ago was 3 hours and 13 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=5.46 hr and s=2.22 hr.)
Suppose that the average time spent per day with digital media several years ago was 3 hours and 13 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=5.46 hr and s=2.22 hr.)
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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Question
Suppose that the average time spent per day with digital media several years ago was
3
hours and
13
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=5.46
hr and
s=2.22
hr.)
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