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Word Problems with a Sample Data Set: A sample of Full-time SUNY Poly students were asked...

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Statistics

Word Problems with a Sample Data Set:

  1. A sample of Full-time SUNY Poly students were asked how manycredit hours they were taking this semester and the followinginformation was obtained. Assume credit hours are approximatelynormally distributed.

16       18       12       17       20       18       15        14

*Round all final answers to 2 decimalplaces if necessary

  1. Construct a 90% confidence interval for the populationmean
  1. Construct a 95% confidence interval for the population standarddeviation
  1. SUNY Poly claims that all their students average less than 18credit hours per semester. Test SUNY’s claim at α = 0.05, what canyou conclude about the claim?

Answer & Explanation Solved by verified expert
3.7 Ratings (647 Votes)
asample mean x16250samplesizen8sample std deviation s2550std error sxsn09014for 90 CI and 7 df critical    See Answer
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