Statistics Solutions

(Steps Shown) You work for a consumer advocate agency and want to find the mean repair cost of a certain brand of washing machine. As part of your study,

Question: You work for a consumer advocate agency and want to find the mean repair cost of a certain brand of washing machine. As part of your study, you randomly select a sample of 40 repairs, determine their costs, and find the mean to be $100.00 with a standard deviation of $17.50.

  1. Construct a 90% confidence interval for the mean repair cost.
  2. If you were able to work with a sample of only 20 repairs, what assumptions would you need to make in order to make your inference?

Price: $2.99
Solution: The downloadable solution consists of 1 pages
Deliverable: Word Document


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