Question

In a poll of 582 human resource professionals, 34.7% said that body piercings and tattoos were big grooming red flags. Complete parts (a) through (d) below a) Among the 582 human resource professionals who were surveyed, how many of the said that body piercings and tattoos were big grooming red flags? 202 (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 flags (Round to three decimal places as needed.) c) Repeat part (o) using a confidence level of 80% (Round to three decimal places as needed)

Answer 1

a poll In of 582 human resource Professionals 34.7). said that body Piercings and takboos were big grooming red flags 582 human were resource Professionals (a) Among the Who surveyed, the & number of persons who said that bode Piercings and tattoos big grooming ved Flags were ase 34.7 X 82 201.95h F 202 joo (6) we have Sample Size 582 202 582 0.347 Sample Proportion (p) ² Caay Considence interval) 0.347 ao dr0.01 Ze = Zudet 2.576 cs Scanned with CamScanner

ara 99% confidence interval estimate of the Proportion ob all human resource Poobessionals believing that body Piercings and tattoos big grooming rede flags is . Ze P (1) P åt ze n 10.34780.63 0.347 2.576 0.347x0.653 0:347 +2.576 26.pan 582 582 0.051 0.347 +0.051 - Co-swa =(0.296 0.398) / ... The 997. (0.296, 0.398) Confidence interval is 0.296 <P < 0.398 سے cs Scanned with CamScanner

We have Sample size 582 n ) Sample Proportion (R) 0.347 0.20 ( 80% Confidenco inberue) zo Zindle 1.282 The 80% Confidence interval is ( Ⓡ - ZV I (1-9) Ã t ze NACIP 0.34780.653 1.282 0.347 40.653 582 0.347 +1.282 582 = (0.347 (0.347 - =(0.322, 0.025 0.347 +0.025) 373) G. I s (0.323, The 80% 0.372) Therefore i " 01322 < P < 0.372 CS Scanned with CamScanner