3. If the sample size in a survey were double, other things being equal how would this change the confidence interval size. A) Divides the interval size by 2 B) Multiply the interval size by 1.41 C)...

3. If the sample size in a survey were double, other things being equal how would
this change the confidence interval size.

A) Divides the interval size by 2
B) Multiply the interval size by 1.41
C) Divides the interval size by 1.41
D) Make the interval size 2 times as big.
E) None of the above.

4. According to The Census Bureau 60% of adults buy clothing online.
a) How many adults did they surveyed in order to be confident that the sample
proportion is in error by no more than 2 percentage points.
b) What about if they did not have prior knowledge of the sample proportion,
How many adults would they need to survey?