I need anwser to part (d) of this question. I don’t know which multiple choice a

Question

I need anwser to part (d) of this question. I don’t know which multiple choice anwser it is or how to fill it in specifically

Homework: Chapter 7 Homework Save Score: 0.43 of 1 pt 3 of9 (8 complete) HW Score: 82 54%, 7 43 019 pts 7.2.23-T Question Help? In a poll of 524 human resource professionals, 56 3% said that body piercings and tattoos were big groom ng red flags. Complete parts a through d below a) Among the 524 human resource professionals who were surveyed, how many of them said that body piercings and tattoos were big grooming red flags? 295 (Round to the nearest integer as needed.) b Construct a 99% confidence interval estimate of the proportion of all human resource professionals believing that body piercings and tattoos are big grooming red lags 0.507 p 0.619 Round to three decimal places as needed) c) Repeat part (b) using a confidence level of 80% 0535

Explanation / Answer

99% confidence interval is wider than 80% as zcrit value for 99% is more than 80%

Z crit for 80%=1.281552=1.28

Z crit for 99%=2.575829=2.58

80% confidence inetrval=

p^-zsqrt(p^(1-p^/n,p^+zsqrt(p^(1-p^/n

0.563-1.28*sqrt(0.563*(1-.563)/524,0.563+1.28*sqrt(0.563*(1-.563)/524

0.535,0.591

99% confidence inetrval=

0.563-2.58*sqrt(0.563*(1-.563)/524,0.563+2.58*sqrt(0.563*(1-.563)/524

0.507,0.619

SOLUTIOND

OPTION D

99% CONFIDENCE INTERVAL is wider than 80% CONFIDENCE INTERVAL.AS THE CONFIDENCE INTERVAL WIDENS,THE PROBABILITY THAT THE CONFIDENCE INTERVALACTUALLY DOES CONTAIN THE POPUALTION PARMETER INCREASES

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