In a poll of 512 human resourceprofessionals, 45.7% said that body piercings and tattoos were big personal grooming red flags. Complete parts(a) through (d)

a. Among the 512 human resource professionals who weresurveyed, how many of them said that body piercings and tattoos were big personal grooming redflags?

234

(Round to the nearest integer asneeded.)

b. Construct a99% confidence interval estimate of the proportion of all human resource professionals believing that body piercings and tattoos are big personal grooming red flags.

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c. Repeat part(b) using a confidence level of80%.

Identify the decimal form of the80% confidence interval from the technologyoutput, rounding to three decimal places.

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d. Compare the confidence intervals from parts(b) and(c) and identify the interval that is wider. Why is itwider?