(Please answer all parts of question) Homework: Section 7-2 HW 11 of 15 4 comple

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(Please answer all parts of question)

Homework: Section 7-2 HW 11 of 15 4 complete) In a poll of505 human resource professionals, 51.5% said that body piercings and tattoos were big grooming red flags. Complete parts (a) through (d) below. a) Among the 505 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.) Enter your answer in the answer box and then click Check Answer. 2 parts. Clear Al javascript doExercisel 13) a Search the web and Windows Save E Question Help Check Answer 2:47 AM OneDrive Desktop E

Explanation / Answer

a) expected number =np =505*0.515~260

b) for p=0.515 ; nn=505

std error =(p(1-p)/n)1/2 =0.022

for 99% cI, z=2.5758

hence confidence interval =point proportion -/+ z*std error =0.458 ; 0.572

c) for 80% CI, z=1.2816

hence confidence interval =point proportion -/+ z*std error =0.486 ; 0.544

d)option C : 99% confidence interval is wider then 80% Confidence interval...

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