One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet at least occasionally. The results showed that 454 out of 478 adults aged 18–29 answered Yes; 741 out of 833 adults aged 30–49 answered Yes; and 1,058 out of 1,644 adults aged 50 and over answered Yes. If required, round your answers to four decimal places. (a) Develop a point estimate of the proportion of adults aged 18–29 who use the Internet. (b) Develop a point estimate of the proportion of adults aged 30–49 who use the Internet. (c) Develop a point estimate of the proportion of adults aged 50 and over who use the Internet. (d) Comment on any apparent relationship between age and Internet use. The input in the box below will not be graded, but may be reviewed and considered by your instructor.

Point estimate is also referred to as sample proportion, p. It is used to estimate the population proportion. The formula for determining point estimate is expressed as

p = x/n

Where

x = number of success

n = number of trials or samples

a) x = 454

n = 478

p = 454/478 = 0.9498

b) x = 741

n = 833

p = 741/833 = 0.8896

c) x = 1058

n = 1644

p = 1058/1644 = 0.6436

The proportion of people that used the internet decreased as the age group increased. Therefore, they are inversely proportional