4) Many smartphones, especially those of the LTE-enabled persuasion, have earned a bad rap for exceptionally poor battery life. Battery life between charges for the Brand M averages 20 hours when the primary use is talk time and 7 hours when the primary use is internet application. Since the mean hours for talk time usage is greater than the mean hours for internet usage, the question was raised as to whether the variance in hours of usage is also greater when the primary use is talk time. Sample data showing battery hours of use for the two applications follows. | Talking 35.8 3.8 30.0 | 22.2 10.3 12.5 32.6 4.0 35.5 16.4 8.5 42.5 8.0 | 12.8 Internet | 14.0 1.9 9.9 |5.4 1.0 15.2 | 4.0 4.7 a. Formulate hypotheses about the two population variances that can be used to determine if the population variance in battery hours of use is greater for the talk time application. b. What are the standard deviations of battery hours of use for the two samples? c. Conduct the hypothesis test and compute the p-value. Using a 0.05 level of significance, what is your conclusion?
4) Many smartphones, especially those of the LTE-enabled persuasion, have earned a bad rap for exceptionally poor battery life. Battery life between charges for the Brand M averages 20 hours when the primary use is talk time and 7 hours when the primary use is internet application. Since the mean hours for talk time usage is greater than the mean hours for internet usage, the question was raised as to whether the variance in hours of usage is also greater when the primary use is talk time. Sample data showing battery hours of use for the two applications follows. | Talking 35.8 3.8 30.0 | 22.2 10.3 12.5 32.6 4.0 35.5 16.4 8.5 42.5 8.0 | 12.8 Internet | 14.0 1.9 9.9 |5.4 1.0 15.2 | 4.0 4.7 a. Formulate hypotheses about the two population variances that can be used to determine if the population variance in battery hours of use is greater for the talk time application. b. What are the standard deviations of battery hours of use for the two samples? c. Conduct the hypothesis test and compute the p-value. Using a 0.05 level of significance, what is your conclusion?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Formulate hypotheses about the two population variances that can be used to determine if
the population variance in battery hours of use is greater for the talk time application.
b. What are the standard deviations of battery hours of use for the two samples?
c. Conduct the hypothesis test and compute the p-value. Using a 0.05 level of significance,
what is your conclusion?
Transcribed Image Text:O TUTO 5.pdf
IS At the end of 2008, the variance
Is The variance in a production pro X
G Many smartphones, especially th x
O File | C:/Users/wan%20aziah%20wan%20zahari/Downloads/TUTO%205.pdf
TUTO 5.pdf
2 | 2
4) Many smartphones, especially those of the LTE-enabled persuasion, have earned a bad
rap for exceptionally poor battery life. Battery life between charges for the Brand M
averages 20 hours when the primary use is talk time and 7 hours when the primary use is
internet application. Since the mean hours for talk time usage is greater than the mean
hours for internet usage, the question was raised as to whether the variance in hours of
usage is also greater when the primary use is talk time. Sample data showing battery
hours of use for the two applications follows.
Talking 35.8
22.2
4.0
|32.6
8.5
42.5
8.0
3.8
30.0
12.8
10.3
35.5
Internet | 14.0
12.5
16.4
1.9
9.9
5.4
1.0
15.2
4.0
4.7
a. Formulate hypotheses about the two population variances that can be used to determine if
the population variance in battery hours of use is greater for the talk time application.
b. What are the standard deviations of battery hours of use for the two samples?
c. Conduct the hypothesis test and compute the p-value. Using a 0.05 level of significance,
what is your conclusion?
+
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15/12/2020
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