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[Solution Library] The following data pertain to the lifetime of fluorescent light bulbs manufactured by two competing companies: Company A Company B Sample

Question: The following data pertain to the lifetime of fluorescent light bulbs manufactured by two competing companies:

Company A Company B

Sample Size n A = 12 n B = 11

Sample Mean (hours) m A = 6,064 rn B = 6,156

Sample Standard Deviation (hours) s A = 120 s B = 140

  1. Test the hypothesis that the variance of the lifetime of the bulbs manufactured by Company A is not significantly different from the variance of the lifetime of the bulbs manufactured by Company B. Let \(\alpha =0.05\). State, clearly, any assumptions you need to make.
  2. Test the hypothesis that the mean lifetime of the bulbs manufactured by Company A is not significantly different from the mean lifetime of the bulbs manufactured by Company. B. Let \(\alpha =0.05\).

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


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