A survey of 1060 randomly selected US teens ages 13 to 17 found that 605 of them say they have made a new friend online

The 90% confidence interval for the proportion of all US teens who have made a new friend online is (0.55, 0.60).

Step-by-step explanation:

The complete question is:

A survey of 1060 randomly selected US teens ages 13-17 found that 605 of them say they have made a new friend online.  Find and interpret a 90% confidence interval for the proportion, p, of all US teens who have made a new friend online.

Solution:

In a sample of 1060 randomly selected US teens ages 13 to 17, 605 said they have made a new friend online.

Compute the sample proportion of US teens ages 13 to 17 who said they have made a new friend online as follows:

The (1 - α)% confidence interval for population proportion is:

The critical value of z for 90% confidence interval is:

*use a z-table.

Compute the 90% confidence interval for the proportion of all US teens who have made a new friend online as follows:

Thus, the 90% confidence interval for the proportion of all US teens who have made a new friend online is (0.55, 0.60).

nswer: a   y-axis

step-by-step explanation: