In a recent year, a research organization found that 419 of 727 surveyed male Internet users use social networking. By contrast 562 of 858 female Internet users use social networking. Let any difference refer to subtracting male values from female values. Complete parts a through d below. Assume that any necessary assumptions and conditions are satisfied.

a) Find the proportions of male and female Internet users who said they use social networking. (Round to four decimal places as needed.)

The proportion of male Internet users who said they use social networking is:

The proportion of female Internet users who said they use social networking is:

Part 2b) What is the difference in proportions? (Round to four decimal places as needed.)

Part 3c) What is the standard error of the difference? (Round to four decimal places as needed.)

Part 4d) Find a 90% confidence interval for the difference between these proportions.