138 out of 274 people chose Friday as their favorite day.

1.) Find a point estimate

2.) Find a 99% Confidence Interval

3.) Suppose only 40% of the population would choose Friday, what's the probability that you'd get a sample proportion over 50%

that last question is the one I'm having the most trouble on!

Question

138 out of 274 people chose Friday as their favorite day.

1.) Find a point estimate

2.) Find a 99% Confidence Interval

3.) Suppose only 40% of the population would choose Friday, what's the probability that you'd get a sample proportion over 50%

that last question is the one I'm having the most trouble on!

anonymous · Answer

I got ^p= .503 (q^=.496)

would I do E=Zcritical multiplied by the square root of (p^)(q^)/n for the second part?