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29 Nov 2021
Problem 49
Page 557
Section: PRACTICE
Chapter 10: HYPOTHESIS TESTING WITH TWO SAMPLE
Textbook ExpertVerified Tutor
29 Nov 2021
Given information
Use the following information for the next five exercises. Two types of phone operating systems are being tested to determine if there is a difference in the proportions of system failures (crashes). Fifteen out of a random sample of 
phones with 
had system failures within the first eight hours of operation. Nine out of another random sample of phones with 
had system failures within the first eight hours of operation. is believed to be more stable (have fewer crashes) than .
Step-by-step explanation
Step 1.
To find the 
press 
and 
Twice to select 
.
Select the sample 
and press 
as displayed,
Once all the sample entries are made press to obtain the results as,
Therefore, the is 
.
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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208
Solutions
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