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: