****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.
