In a poll of

515

human resource professionals,

45.6%

said that body piercings and tattoos were big personal grooming red flags. Complete parts (a) through (d) below.

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Part 1

a. Among the

515

human resource professionals who were surveyed, how many of them said that body piercings and tattoos were big personal grooming red flags?

235235

(Round to the nearest integer as needed.)

Part 2

b. Construct a 99% confidence interval estimate of the proportion of all human resource professionals believing that body piercings and tattoos are big personal grooming red flags.

0.4000.400

(Round to three decimal places as needed.)

Part 3

c. Repeat part (b) using a confidence level of 80%.

enter your response here

(Round to three decimal places as needed.)