In a poll of 568 human re a) Among the 568 human resource professionals who were

Question

In a poll of 568 human re a) Among the 568 human resource professionals who were surveyed, how many of them said that body piercings and tattoos were big grooming red fnags? 281 Round to the nearest integer as needed) b) Construct a 99% contence in eral est mate of the proportion of all human resource rofessionals believing that body piercings and tattoos are big grooming ed nags. professionals, 49 5% said that body piercings and tattoos were big grooming red tags Complete parts (a) through (d) below (Round to three decimal places as needed

Explanation / Answer

(a) n = 568

p^ = 49.5% = 0.495

Number of surveyors = 568 * 0.495 = 281.16 or 281

(b) 99% confidence interval for p^ = p^ +- Z99% sqrt [p^ * (1 - p^)/N]

= 0.495 +- 2.575 * sqrt [0.495 * 0.505 /568]

= 0.495 +- 2.575 * 0.0210

= (0.441, 0.549)

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