When the statistics exam is handed back, you are curious about many people in your class got an a (raw score greater than 78 points). the class mean was 72.5 and the standard deviation was 4.3. what proportion of the class scored higher than 78?

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )

sites:

actually what is a question i don't understand