Stats Solutions

[See Solution] In a random sample of 60 computers, the mean cost for repairs was $150. From past studies, it was found that the standard deviation was = $36.

Question: In a random sample of 60 computers, the mean cost for repairs was $150. From past studies, it was found that the standard deviation was = $36.

  1. Find the margin of error E for a 90% confidence interval. Round your answer to the nearest hundredths.
  2. Construct a 90% confidence interval for the mean life, of repair costs. (5 points)

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Solution: The downloadable solution consists of 3 pages
Deliverable: Word Document


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