A study compares students who use a website and students who do not use the website. In addition to asking the students in the samples about GPA, each student was also asked how many hours he or she spent studying each day. The two samples (141 students who were users of the website and 68 students who were not users of the website) were independently selected from students at a large, public Midwestern university. Although the samples were not selected at random, they were selected to be representative of the two populations. For the sample of users of the website, the mean number of hours studied per day was 1.48 hours and the standard deviation was 0.83 hours. For the sample of students who do not use the website, the mean was 2.79 hours and the standard deviation was 0.99 hours. Do these sample data provide convincing evidence that the mean time spent studying for users of the website at this university is less than the mean time spent studying by students at the university who do not use the website? Use a significance level of 0.01. (Use a statistical computer package to calculate the P-value. Use μusers - "not Round your test statistic to two decimal places, your df down to the nearest whole number, and your P-value to three decimal places.) t = users' df P-value = State your conclusion. Do not reject Ho. We do not have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website. Reject Ho. We do not have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website. Reject Hò. We have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website. ○ Do not reject Ho. We have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

11.1.5.2

A study compares students who use a website and students who do not use the website. In addition to asking the students in the samples about GPA, each student was also asked how
many hours he or she spent studying each day. The two samples (141 students who were users of the website and 68 students who were not users of the website) were independently
selected from students at a large, public Midwestern university. Although the samples were not selected at random, they were selected to be representative of the two populations.
For the sample of users of the website, the mean number of hours studied per day was 1.48 hours and the standard deviation was 0.83 hours. For the sample of students who do not use
the website, the mean was 2.79 hours and the standard deviation was 0.99 hours. Do these sample data provide convincing evidence that the mean time spent studying for users of the
website at this university is less than the mean time spent studying by students at the university who do not use the website? Use a significance level of 0.01. (Use a statistical computer
package to calculate the P-value. Use μusers - "not
Round your test statistic to two decimal places, your df down to the nearest whole number, and your P-value to three decimal
places.)
t =
users'
df
P-value =
State your conclusion.
Do not reject Ho. We do not have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by
students at the university who do not use the website.
Reject Ho. We do not have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at
the university who do not use the website.
Reject Hò. We have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the
university who do not use the website.
○ Do not reject Ho. We have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at
the university who do not use the website.
Transcribed Image Text:A study compares students who use a website and students who do not use the website. In addition to asking the students in the samples about GPA, each student was also asked how many hours he or she spent studying each day. The two samples (141 students who were users of the website and 68 students who were not users of the website) were independently selected from students at a large, public Midwestern university. Although the samples were not selected at random, they were selected to be representative of the two populations. For the sample of users of the website, the mean number of hours studied per day was 1.48 hours and the standard deviation was 0.83 hours. For the sample of students who do not use the website, the mean was 2.79 hours and the standard deviation was 0.99 hours. Do these sample data provide convincing evidence that the mean time spent studying for users of the website at this university is less than the mean time spent studying by students at the university who do not use the website? Use a significance level of 0.01. (Use a statistical computer package to calculate the P-value. Use μusers - "not Round your test statistic to two decimal places, your df down to the nearest whole number, and your P-value to three decimal places.) t = users' df P-value = State your conclusion. Do not reject Ho. We do not have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website. Reject Ho. We do not have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website. Reject Hò. We have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website. ○ Do not reject Ho. We have convincing evidence that the mean time spent studying for the website users at this university is less than the mean time spent studying by students at the university who do not use the website.
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman