1. Tres Chic considers consumers who spent $2000 or more as "Big Spenders". What is the width of a 90% confidence interval for the proportion of "Big Spenders"?

1.66%

4.29%

8.58%

0.6%

2. Tres Chic wants to further study the proportion of "Big Spenders" so that the margin of error for a 95% confidence interval is within 1%. Assume that Tres Chic did not make any previous studies and does not precisely know the value of the sample proportion. What is the smallest sample size to achieve the desired margin of error?

9600

5100

10000

7975