Company X claims that its cell phones last significantly longer than cell phones sold by Company Y. The company collected the mean length of time that cell phones from each company last before needing to be replaced. Sample Mean Sample Standard Deviation Sample Size Company A Company B 3.456 2.876 0.68 80 80 Is there sufficient evidence to reject the null hypothesis (that the mean length of time for the two populations is equal) at a significance level of 0.01? Oz-score = 4.7657, P-value < 0.00001; reject the null hypothesis Oz-score = 4.7657, P-value < 0.00001; fail to reject the null hypothesis 1-score = 6.7398, P-value <0.00001; reject the null hypothesis Or-score = 6.7398, P-value < 0.00001; fail to reject the null hypothesis
Company X claims that its cell phones last significantly longer than cell phones sold by Company Y. The company collected the mean length of time that cell phones from each company last before needing to be replaced. Sample Mean Sample Standard Deviation Sample Size Company A Company B 3.456 2.876 0.68 80 80 Is there sufficient evidence to reject the null hypothesis (that the mean length of time for the two populations is equal) at a significance level of 0.01? Oz-score = 4.7657, P-value < 0.00001; reject the null hypothesis Oz-score = 4.7657, P-value < 0.00001; fail to reject the null hypothesis 1-score = 6.7398, P-value <0.00001; reject the null hypothesis Or-score = 6.7398, P-value < 0.00001; fail to reject the null hypothesis
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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Company X claims that
![Company X claims that its cell phones last significantly longer than cell phones sold by
Company Y. The company collected the mean length of time that cell phones from each
company last before needing to be replaced.
Sample Mean Sample Standard Deviation Sample Size
Company A
Company B
3.456
0.68
80
80
Is there sufficient evidence to reject the null hypothesis (that the mean length of time for the
two populations is equal) at a significance level of 0.01?
Oz-score = 4.7657, P-value < 0.00001; reject the null hypothesis
Oz-score = 4.7657, P-value < 0.00001; fail to reject the null hypothesis
-score = 6.7398, P-value < 0.00001; reject the null hypothesis
-score = 6.7398. P-value < 0.00001; fail to reject the null hypothesis](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F074d9b5f-5175-4ef7-9349-2534a4c476c6%2Ff1b4131e-1ec1-47ce-ad9c-9438b093002b%2F3bk2wtl_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Company X claims that its cell phones last significantly longer than cell phones sold by
Company Y. The company collected the mean length of time that cell phones from each
company last before needing to be replaced.
Sample Mean Sample Standard Deviation Sample Size
Company A
Company B
3.456
0.68
80
80
Is there sufficient evidence to reject the null hypothesis (that the mean length of time for the
two populations is equal) at a significance level of 0.01?
Oz-score = 4.7657, P-value < 0.00001; reject the null hypothesis
Oz-score = 4.7657, P-value < 0.00001; fail to reject the null hypothesis
-score = 6.7398, P-value < 0.00001; reject the null hypothesis
-score = 6.7398. P-value < 0.00001; fail to reject the null hypothesis
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