Step 1:

The total number of women in the survey n : 427.

The probability that women purchase books online $\"\"$ : 29 % = 0.29.

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 95% of confidence interval, $\"\"$ .

$\"\"$

95% of confidence interval for the proportion is

$\"\"$

95% of confidence interval for the proportion is $\"\"$ .

Solution:

95% of confidence interval for the proportion is $\"\"$ .