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; 1058 out of 1644 adults aged 50 and over answered yes.

a.) Develop a point estimate of the proportion of adults aged 18 – 29 who use the Internet.
My answer: 0.9497

e.) Suppose your target population of interest is that of all adults (18 years of age and over). Develop an estimate of the proportion of that population who use the Internet.

I need clarification on e) I'm not exactly sure how to go about solving for a population. Thank you for the help.

E=.7624

A. .9498

E. (454+741+1058)/(478+833+1644) = ?

To solve part e) and estimate the proportion of adults (18 years of age and over) who use the Internet, you can combine the data from all age groups and calculate the overall proportion.

First, sum up the total number of adults across all age groups who answered "yes" to using the Internet:
Total "yes" responses = 454 + 741 + 1058 = 2253

Next, sum up the total number of adults across all age groups who were surveyed:
Total adults surveyed = 478 + 833 + 1644 = 2955

Finally, divide the total "yes" responses by the total adults surveyed to find the estimated proportion of the population who use the Internet:
Estimated proportion = Total "yes" responses / Total adults surveyed = 2253 / 2955 ≈ 0.7624

Therefore, the estimated proportion of adults (18 years of age and over) who use the Internet is approximately 0.7624, or 76.24%.

To develop an estimate of the proportion of the population who use the Internet, we can use the point estimates obtained from the sample data. In this case, we have point estimates for three age groups: adults aged 18-29, adults aged 30-49, and adults aged 50 and over.

Since the target population of interest is all adults aged 18 and over, we need to combine the information from all three age groups to get an estimate for the entire population.

To do this, we first calculate the total number of adults in each age group who answered yes to using the Internet:
- Adults aged 18-29: 454 out of 478 answered yes
- Adults aged 30-49: 741 out of 833 answered yes
- Adults aged 50 and over: 1058 out of 1644 answered yes

Next, we calculate the total number of adults in each age group:
- Adults aged 18-29: 478 total adults
- Adults aged 30-49: 833 total adults
- Adults aged 50 and over: 1644 total adults

Now, we sum up the number of adults who answered yes across all age groups (454 + 741 + 1058 = 2253) and the total number of adults in all age groups (478 + 833 + 1644 = 2955).

Finally, we divide the total number of adults who answered yes (2253) by the total number of adults (2955) to get the point estimate of the proportion of the population who use the Internet.

e.) Estimate of the Proportion of Adults (18 and over) who use the Internet:
2253 / 2955 ≈ 0.762 or 76.2%

Therefore, the estimate is that approximately 76.2% of all adults (aged 18 and over) use the Internet.