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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Question
Suppose that the average time spent per day with digital media several years ago was
mean time spent per day with digital media by adults of the region. (Note:
3
hours and
27
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
95%
confidence interval for last year's x=5.45
hr and
s=2.20
hr.)Click here to view the digital media times.
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Click here to view page 1 of the t-table.
Click here to view page 2 of the t-table.
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Question content area bottom
Part 1
The
95%
confidence interval is from
enter your response here
hour(s) to
enter your response here
hour(s).(Round to two decimal places as needed.)
Part 2
Interpret the
95%
confidence interval. Select all that apply.With
95%
confidence, the mean amount of time spent per day on digital media last year by all adults in the region is between the interval's bounds.95%
of all adults in the region spent amounts of time per day on digital media last year that are between the interval's bounds.95%
of all possible random samples of
20
adults in the region have mean amounts of time spent per day on digital media last year that are between the interval's bounds.There is a
95%
chance that the mean amount of time spent per day on digital media last year by all adults in the region is between the interval's bounds.Digital Media Times
2.1
|
5.5
|
6.4
|
4.3
|
5.6
|
|
2.6
|
6.8
|
2.6
|
8.1
|
9.5
|
|
7.4
|
6.0
|
9.5
|
4.5
|
2.8
|
|
3.2
|
5.6
|
5.1
|
4.4
|
6.9
|
D
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