A 2010 survey by CarMD. com found that 64% of vehicle owners avoided automotive maintenance and repairs. Suppose Sears Automotive would like to perform a hypothesis test to challenge this finding. From a random sample of 170 vehicle owners that was recently taken, it was found that 103 avoid maintenance and repairs. Using σ = 0.02, answer the following questions:
a. Based on this sample, can we conclude that the proportion of vehicle owners who avoid maintenance has changed since 2010?
b. Determine the p value for this test.
c. Verify your results using PHStat.

  • CreatedJuly 17, 2015
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