According to a Pew Research Center nationwide telephone survey of American adults, 75% of adults said that college education has become too expensive for most people, and they cannot afford it. One wants to find the probability that in a random sample of 1400 adult Americans, more than 76.5% of the adults in this sample will hold this opinion. Find the z score only.

The z score is 1.324.

Step-by-step explanation:

We are given that according to a Pew Research Center nationwide telephone survey of American adults, 75% of adults said that college education has become too expensive for most people, and they cannot afford it.

Also, a random sample of 1400 adult Americans is taken.

Let p = % of adults who said that college education has become too expensive according to a Pew Research Center nationwide telephone survey.

Now, the z score probability distribution for sample proportion is given by;

              Z = ~ N(0,1)

where, = % of the adults in the sample of 1400 adult Americans who hold this opinion = 76.5%

           n = sample of Americans = 1400

Now, probability that in a random sample of 1400 adult Americans, more than 76.5% of the adults will hold this opinion is given by = P( > 76.5%)

    The z-score is =

                             = 1.324

Therefore, the z score is 1.324.

addition

step-by-step explanation:

it is not that hard all u have to do is plot the graph

step-by-step explanation: