Question

QUESTION 5

1. Calculate the point estimate for this problem.  Follow the rounding described in the Power Point Notes.

   A student watches 185 people exit a Wawa. 46 of them are carrying a cup of coffee. Find the point estimate from this sample for the true percentage of people purchasing a coffee at Wawa.

   A.

   24.9%

   B.

   25%

   C.

   40.2%

   D.

   46%

   QUESTION 6

   Calculate the point estimate for this problem.  Follow the rounding described in the Power Point Notes.

   A student asks 415 people what color eyes they have. 31 of these people have green eyes. Find the point estimate from this sample for the true percentage of people who have green eyes.

   	A.	7.5%
   	B.	13.4%
   	C.	74.7%
   	D.	75%

   QUESTION 7

   If you are working with 90% confidence, what is the critical value (z-score) that you should use to calculate your margin of error?

   	A.	1.645
   	B.	1.96
   	C.	2.575

   QUESTION 8

   If you are working with 95% confidence, what is the critical value (z-score) that you should use to calculate your margin of error?

   	A.	1.645
   	B.	1.96
   	C.	2.575

Answer 1

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