Math Solutions

[Solution Library] A personnel director claims that the mean annual wage is greater in Allegheny County than it is in Erie County. In Allegheny County,

Question: A personnel director claims that the mean annual wage is greater in Allegheny County than it is in Erie County. In Allegheny County, a random sample of 19 residents has a mean annual income of $30,800 and a standard deviation of $8600. In Erie County, a random sample of 15 residents has a mean annual income of $25,700 and a standard deviation of $5500. Assume annual incomes follow a normal distribution.

  1. Construct a 90% confidence interval for the difference between the two population means.
  2. Looking at the confidence interval explain why or why not, you support the personnel director’s claim?

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Solution: The downloadable solution consists of 2 pages
Deliverable: Word Document


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