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  3. ****return to problem 5.3.2 and answer the questio

****Return to problem 5.3.2 and answer the questions posed, using the t distribution rather than the...

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Basic Math

****Return to problem 5.3.2 and answer the questionsposed, using the t distribution rather than the standard normaldistribution.  In other words, the problem was originallyposed assuming that the population’s standard deviation ? isknown.  Now answer the questions assuming the standarddeviation is estimated from the sample itself.  What arethe degrees of freedom?***

5.3.2 The study cited in Exercise 5.3.1 reported an estimatedmean serum cholesterol level of 183 for women aged 20–29 years. Theestimated standard deviation was approximately 37. Use theseestimates as the mean m and standard deviation s for the U.S.population. If a simple random sample of size 60 is drawn from thispopulation, find the probability that the sample mean serumcholesterol level will be:

(a) Between 170 and 195 (b) Below 175 (c) Greater than 190

The real question is bolded the other is just the info needed toanswer the question.

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SolutionThe degrees of freedom is a Between 170 and 195Answer We have    See Answer
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