A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within

2

percentage points with

90%

confidence if

(a) he uses a previous estimate of

34%?

(b) he does not use any prior estimates?

Click here to view the standard normal distribution table (page 1).

LOADING...

Click here to view the standard normal distribution table (page 2).

LOADING...

Question content area bottom

Part 1

(a)

n=enter your response here

(Round up to the nearest integer.)

Part 2

(b)

n=enter your response here

(Round up to the nearest integer.)