In a poll of 610 human resource professionals, 48.5% said that body piercings and tattoos were big grooming red flags. complete parts (a) through (d) below.
a) among the 506 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. nothingless than p less (round to three decimal places as needed.)
c) repeat part (b) using a confidence level of 80%. nothingless than p less (round to three decimal places as needed.)
d) compare the confidence intervals from parts (b) and (c) and identify the interval that is wider. why is it wider?