Mathematics, 18.11.2019 03:31 canonmille2

Acompany that produces cell phones claims its standard phone battery has a mean lifetime of 35 hours with a standard deviation of 2.25 hours. in order to investigate the company’s claim, a consumer advocacy group takes a sample of 75 batteries and finds a mean lifetime of 34.45 hours. at a 1% level of significance, is there evidence for the consumer advocacy group to conclude that the mean lifetime of the batteries is lower than claimed?
blank #1: is this a question involving mean or proportion?

blank #2: which type of distribution should be used to calculate the probability for this question?

blank #3: which of the following options are the appropriate hypotheses for this question:

a) h0: μ = 34.45 hrs h1: μ > 34.45 hrs

b) h0: μ = 35 hrs h1: μ > 35 hrs

c) h0: μ = 34.45 hrs h1: μ < 34.45 hrs

d) h0: μ = 35 hrs h1: μ < 35 hrs

e) h0: μ = 34.45 hrs h1: μ ≠ 34.45 hrs

f) h0: μ = 35 hrs h1: μ ≠ 35 hrs

blank #4: what is the p-value of this sample? answer to 4 decimals, be sure to include leading zero, example "0.1234" ".1234"

blank#5: based on this sample, at a 1% level of significance, is there evidence for the consumer advocacy group to conclude that the mean lifetime of the batteries is lower than claimed? answer "yes" or "no" (without the quotation marks)

question 1 options:

Answers: 1

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Acompany that produces cell phones claims its standard phone battery has a mean lifetime of 35 hours...

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