Sampie UIL Estimating Parameters and Determining Using Correct Distribution. In

Question

Sampie UIL Estimating Parameters and Determining Using Correct Distribution. In Exereises 5-8, assume that we want to constract dence interval. Do one of the following, as appropriate: (a) Find the critical value (b) find the critical value twp, or (o) state that neither the normal distribution nor the a confi t distribution applies ousands oi dolars) of Miamm 6, Denver Bronco Salaries Confidence level is 90%, is not known, and the 61 player salaries (thousands of dollars) is as shown histogram of 40 301 20- 4000 8000 12000 16000 20000 Salary (thousands of dollars) saianes (uousands oi dollars) is shown in Exercise o. 8. Birth Weights Here are summary statistics for randomly selected weights of newborn gifs n = 205, x = 30.4 hg, s-71 hg (based on Data Set 4 "Births" in Appendix B). The cot dence level is 95%.

Explanation / Answer

as per chegg policies i am answering Q1 only

6) sigma is unknown but sample size is large (61). hence z distribution follows. z(a/2) = z(.10/2) = 1.645

8) since sample size is large, i test z statisic. z(a/2) = z(0.05/2) = 1.96

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