Question

C Net. com reports that the average talk time battery life for Nokia’s model 1661 phone is 9.3 hours (source: reviews. cnet. com). In a test involving 64 recharges, you find that the average battery life is 8.9 hours for this model. Given the following hypotheses, H0: μ = 9.3 (The average talk time battery life for the Nokia 1661 is 9.3 hours.) Ha: μ ≠ 9.3 (The average talk time battery life for the Nokia 1661 is not 9.3 hours.)
a. Compute the p value for the sample result in this two tailed test. Assume the population standard deviation is 2.2 hours.
b. If the significance level is 5%, can the null hypothesis be rejected? Explain.


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  • CreatedJuly 16, 2015
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