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Mrs. Warrack, a retired archeologist, enjoys hiking in Badger Creed every other day. Usually she travels...

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Basic Math

Mrs. Warrack, a retired archeologist, enjoys hiking in BadgerCreed every other day. Usually she travels 3 miles per hike. Duringthe past year Mrs. Warrack has recorded the times of her hikes. Fora sample of 90 times, the mean was x ?=23.18 minutes and thestandard deviation was s = 1.87 minutes. Let ? mean the mean hikingtime for the entire distribution of Mrs. Warrack’s 3-mile hiketimes (taken over the past year )    

How many degrees of freedom are there?    

Find a 0.95 confidence interval ?. Use t*= 1.987 .

Answer & Explanation Solved by verified expert
4.1 Ratings (511 Votes)
Solution Given that 2318s 187n 90Degrees of freedom    See Answer
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