Step 1:

The total number of adults who consumed alcoholic beverages are n :  1011.

The probability that adults who agreed is : 64 % = 0.64.

Definition of specific confidence interval for a proportion : ,

where is the population proportion.

is the sample proportion.

.

n is the sample size.

is the confidence interval.

Step 2:

 for 90 % confidence interval is 1.65.

.

90% of confidence interval for the proportion is

90% of confidence interval for the proportion is .

Solution:

95% of confidence interval for the proportion is .