The point estimate of p: 0.67.
The sample proportion is calculated as the ratio of the number of individuals who have paid to download music to the total sample size. In this case, the sample proportion (
= Number of adults who have paid to download music / Total sample size
From the information provided, the total sample size is 755, and the number of adults who have paid to download music is 506. Therefore:
=506 / 755
= 0.6695
p is approximately 66.95% or 0.67.
Paying for music downloads. If you use the Internet, have D you ever paid to access or download music? This was one MUSIC of the questions of interest in a recent Pew Internet and American Life Project Survey (Oct. 2010). In a representa- tive sample of 755 adults who use the Internet, 506 stated that they have paid to download music. Let p represent the true proportion of all Internet-using adults who have paid to download music.
Compute a point estimate of p.