7-1 From a KRC Research poll in which respondents were asked if they felt vulnerable to...

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Answer 1

Answer #1

Ans:

7-1)

sample proportion=531/1002=0.530

95% Confidence lnterval for p

=0.530+/-1.96*sqrt(0.530*(1-0.530)/1002)

=0.530+/-0.031

=(0.499, 0.561)

7-2)

sample proportion=1083/2518=0.430

90% Confidence lnterval for p

=0.430+/-1.645*sqrt(0.430*(1-0.430)/2518)

=0.430+/-0.016

=(0.414, 0.446)

Answer 2

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