The Gallup Organization conducted a poll in which a simple random sample of 1016 Americans 18 and older were asked, “Do you consider the amount of federal income tax you have to pay is fair?” Of the 1016 adult Americans surveyed, 558 said yes. Obtain a point estimate for the proportion of Americans 18 and older who believe the amount of federal income tax they pay is fair.

Approach The point estimate of the population proportion is

and n = 1016.

= where x = 558 n