Question

As of 2021 the average cost of tuition for four year public universities in North Carolina was estimated 23,000 with a standard deviation of 7200 assume that the distribution of college tuition cost in North Carolina is normal according to the 68–9 5–9 9.7 rule approximately what percentage of students tuition cost in North Carolina is higher than 15,800

Answer 1

Solution

Step by step explanation:

Estimated value = 23000

standard deviation = 7200

$68-95-99.7\text{ = 68\%, 95\%, 99.7\%}$

$Z_{score}=23000-72000=15800$

The percentage of students tuition cost in North Carolina is equal to 15,800

Hence from the image the correct percentage = 68 %

So the answer isOption AC