Question

40. A cell phone manufacturer claims that its phone will last for more than 8 hours...

40. A cell phone manufacturer claims that its phone will last for more than 8 hours of continuous talk time when the battery is fully charged. To test this claim at a​ 10% level of​ significance, a random sample of 18 phones were selected. The results showed a sample mean of 8.2 hours and a sample standard deviation of 0.4 hour.

Based on the data and hypothesis​ test, can you dispute the cell phone​ manufacturer’s claim?

A.

YES

B.

NO

C.

there is not enough information to answer this question

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

vs

=2.12

Degree of freedom =n-1 = 18-1 = 17

P value is 0.0245 < 0.10

TDIST(2.12,17,1).....................for p value by using Excel command.

We reject H0.

We have sufficient evidence to say that,  its phone will last for more than 8 hours of continuous talk time when the battery is fully charged.

Option A) is correct.

Yes.

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