Question

5. A simple random sample of 720 American workers was taken as part of a poll. Among these 720 workers, 55% stated that they expect to leave their job within the next five years. [14 pts] How many of the 720 workers sampled expect to leave their job within the next five years? a. b. Check the conditions required to use the confidence interval procedure. c. Construct a 90% confidence interval for the proportion of all American workers who expect to leave their job within the next five years. d. Write a sentence reporting the confidence interval. What is the margin of error for the 90 % confidence interval? e. f. State two ways that the margin of error could be decreased.

Answer 1

S Given PmopenHen (p)r statement T/. f 720 wokey m-720 ai Accrn wen ect teave So 72 o x 396 when Comfidene 2nteIVOls (CI-) the met data Sampled Randomizaton Conditio Hene nandom indspendint to au Inde bendorre - Sample alvey each othen () lang m72a Semplk Samp le appoache to Nonmal Sqmble size qnd enngh distribution Cniti al Val 1 o.40- o-lo fon Z1-a C.I PtzP1-P) ZC.64, So (412 0.55(1-0) 720 C0.2,0.54) Hen ce to wonkey expect t five leave thein job withM

0 ss(-9.s5) Pl-P) Hene 1-645 720 O.o30499 clea that byincneasin Sampk Siz uch that z iA minimym fon it formyia (n) and choosinj YPLEASE LIKE