Homework: Homework #15 (Due Monday, November 27, at 7:00 Score:57 of 4 7.2.23-T
ID: 3310856 • Letter: H
Question
Homework: Homework #15 (Due Monday, November 27, at 7:00 Score:57 of 4 7.2.23-T 3of12(12 complete ) In a poll of 566 human resource professionals, 52.2% said that body percn gs and tattoos were bg groom ng red flags complete pats (a) through d below a) Among the 556 human resource professionals who were surveyed, how many of them said that body piercings and tattoos were big grooming red flags? Round to the nearest integer as needed) b) Construct a 99% confidence interval estimate of the proportion of all human resource p ofessonals beliem g that body piercings and tamoos are bg grooming red flags 0.467Explanation / Answer
a) 52.2% of 556
= 52.2/100 * 556
= 290.232
= 290.
b) LCL = 0.522 - 2.576 * (0.522 * 0.478 / 556)
= 0.467
UCL = 0.522 + 2.576 * (0.522 * 0.478 / 556)
= 0.522 + 2.576 * (0.522 * 0.478 / 556)
= 0.577
=> 0.467 < p < 0.577.
c) z value for 80% = 1.2815.
LCL = 0.522 - 1.2815 * (0.522 * 0.478 / 556)
= 0.495
UCL = 0.522 + 1.2815 * (0.522 * 0.478 / 556)
= 0.522 + 1.2815 * (0.522 * 0.478 / 556)
= 0.549
=> 0.495 < p < 0.549.
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