Eric randomly surveyed 150 adults from a certain city and asked which team in a contest they were rooting for, either North High School or South High School. From the results of his survey, Eric obtained a 95% confidence interval of (0.52,0.68) for the proportion of all adults in the city rooting for North High. What proportion of the 150 adults in the survey said they were rooting for North High School?

Proportion = 0.6 or 60 %

Step-by-step explanation:

Given:

- The obtained 95% confidence interval of a sample of adults rooting for North High:

                                         (0.52 , 0.68)

- Sample size n = 150

Find:

What proportion of the 150 adults in the survey said they were rooting for North High School?

Solution:

The proportion of adults rooting for North high corresponds to the mean value of interval, as follows:

                             Proportion = ( 0.52 + 0.68 ) / 2

                            Proportion = 0.6 or 60 %

step-by-step explanation:

it has to have an angle of 90 degrees