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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.
Since, the test is testing the proportions of phones with and having system failure within hours of operation. Therefore,
This is a test of proportions.
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