In a poll of 539 human resource professionals, 52.5% said that body piercings an

Question

In a poll of 539 human resource professionals, 52.5% said that body piercings and were big grooming red flags. Complete parts (a)through (d) below. a)Among the 539 human resource professionals who were surveyed, how many of them said that body piercings and tattoos were big grooming red fags? (Round to the nearest integer as needed.) b) Construct 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 (b) using a confidence level of 80%.

Explanation / Answer

a) 539*(0.525) = 283

b) Statistical software output for this problem is:

One sample proportion confidence interval:
p : Proportion of successes
Method: Standard-Wald

99% confidence interval results:

Hence,

99% confidence interval is:

0.470 < p < 0.580

c) Statistical software output for this problem is:

One sample proportion confidence interval:
p : Proportion of successes
Method: Standard-Wald

80% confidence interval results:

Hence,

80% confidence interval is:

0.497 < p < 0.553

d) Option C; 99; 80

Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 282.975 539 0.525 0.021509587 0.46959498 0.58040502

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