Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of

5

percentage

points

and use a confidence level of

90%.

Complete parts (a) and (b) below.

a. Assume that

p

and

q

are unknown.

n=enter your response here

(Round up to the nearest integer.)

b. Assume that

23%

of adults can wiggle their ears.

n=

(Round up to the nearest integer.)