Scores on Ms. Nash's test have a mean of 64 and a standard deviation of 9. Steve has a score of 52. Convert Steve's score to a z-score. (Round to two decimal places if necessary.)

a. 58.2
b. –1.33
c. 1.33
d. –2

b. –1.33

Step-by-step explanation:

The z-score measures how many standard deviations a score X is above or below the mean.

It is given by the following formula:

In which is the mean and is the standard deviation.

In this problem, we have that:

. We have to find Z

So the correct answer is:

b. –1.33

after simplifying it i got: -36.25 as my answer. hope that !

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.