Question

Based on the class sample, you will create a 95% confidence interval for the mean age and the proportion of males in the population of all online college students. Using the same sheet as part 2, answer the following in the "week 5"tab: . For the average age, form a 95% confidence interval: o What distribution should be used? What is the critical value? o What is the error bound? o What is the lower bound? o What is the upper bound? • For the proportion of males, form a 95% confidence interval: What distribution should be used? o What is the critical value? What is the error bound? o What is the lower bound? o What is the upper bound?

Answer 1

Answer:-

Page one

4) c=oogs, REI-OOS A in 25 I X i) x = Age Here we should used t- disterbution "i) tititicata Anketa st24, 0:05/2 2.064 148) Erre bound bound = tn-l, al Sign sample standard deviation = {(xi-X22 3960 24 . nal Sa 12.8452 2302 n 25 z sample mean= Exi:- 3.20 :i Erros bound = 21064 x 120.8452 125 iv) Lowes bound X - Eyroz bound 5.30 25 11 33.2 s. 3025 278995 uppes bound bound = Ă + - Ž + Error and 33:2 + 5.3025 38. 5025

Page two

B = 25 n= total (students) X: No.of fullesser Cage) - 10 For males p - x = 0.4 lo E sample 25 peopletion is should used z test Normal distébuitin Here We used ii) Freitical Zoz to 96 1.96 10 Error bound Zefz Pule ) h 1:26.50-4.40:6 - Q.1920 iv) lower bound = Ê - Error bound 0.4-0.1920 0 2080 opper bound bound + Error 0.4+ 0.1920 0, 5920

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