Mathematics: The scores on a test given to all juniors in a school district are normally distributed with a mean of 75 and a standard deviation of 7. find the percent of juniors whose score is no more than 89. the percent of juniors whose score is 89 or below is %

Step-by-step explanation:P(tail) = P(2) = P(tail and 2 ) = × =...

The scores on a test given to all juniors in a school

neko64

06.01.2022

$\mathbb P(X\le89)=\mathbb P\left(\dfrac{X-75}7\le\dfrac{89-75}7\right)=\mathbb P(Z\le2)\approx0.9773=97.73\%$

0,0(0 оценок)

hilllz4793

26.08.2021

$\frac{1}{12}$

Step-by-step explanation:

P(tail) = $\frac{1}{2}$

P(2) = $\frac{1}{6}$

P(tail and 2 ) = $\frac{1}{2}$ × $\frac{1}{6}$ = $\frac{1}{12}$

0,0(0 оценок)