Math Solutions

(Solution Library) In an advertisement it is claimed that a brand of domestic air freshener will last on average at least 70 days. The mean and standard

Question: In an advertisement it is claimed that a brand of domestic air freshener will last on average at least 70 days. The mean and standard deviation of the lifetimes of a sample of 19 air fresheners were 69.3 days and 2.9 days respectively.

  1. Test the claim made for the product using a 5% level of significance.
  2. What assumption must be made for the test to be valid?

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Deliverable: Word Document


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