Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.2 minutes. Assume the standard devlation is d= 10.0 minutes. Suppose that a simple random sample of 103 visits was selected this year and has a sample mean of r= 19.2 minutes. A social scientist is intere to know whether the mean time of Facebook visits has decreased. Use the a0.10 level of significance and the critical value method with the table. (a) State the appropriate null and alternate hypotheses. (b) Compute the value of the test statistic. (c) State a conclusion. Use the a=0.10 level of significance.
Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.2 minutes. Assume the standard devlation is d= 10.0 minutes. Suppose that a simple random sample of 103 visits was selected this year and has a sample mean of r= 19.2 minutes. A social scientist is intere to know whether the mean time of Facebook visits has decreased. Use the a0.10 level of significance and the critical value method with the table. (a) State the appropriate null and alternate hypotheses. (b) Compute the value of the test statistic. (c) State a conclusion. Use the a=0.10 level of significance.
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
See pictures
Questions 4 and 5.
4- Choose one (Reject/Do not reject)
5- Choose one (Is/Is not)
Transcribed Image Text:Part 4 of 5
Determine whether to reject H
(Choose one) v the null hypothesis, H, at the a=0.10 level.
Reject
Do not reject
Part: 4 /5
Part 5 of 5
© State a conclusion.
There (Choose one) v enough evidence to conclude that the mean time of Facebook visits has decreased.
Transcribed Image Text:Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.2 minutes. Assume the standard devlation is d = 10.0
minutes. Suppose that a simple random sample of 103 visits was selected this year and has a sample mean of x= 19.2 minutes. A social scientist is interest
to know whether the mean time of Facebook visits has decreased. Use the a
0.10 level of significance and the critical value method with the table.
(a) State the appropriate null and alternate hypotheses.
(b) Compute the value of the test statistic.
(c) State a conclusion. Use the a =0.10 level of significance.
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