Job Interviews In a Harris poll of 514 human resource professionals, 45.9% said that body piercings and tattoos were big grooming red flags.

a. Among the 514 human resource professionals who were surveyed, how many of them said that body piercings and tattoos were big grooming red flags?

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.

c. Repeat part

(b) using a confidence level of 80%.

d. Compare the confidence intervals from parts

(b) and

(c) and identify the interval that is wider. Why is it wider?