Question

Suppose the test scores of students in a class are normally distributed with a mean of 92 and a standard deviation of 3.

What is the z-score for a student who scored 86 on a test?

Answer 1

@Vocaloid

Answer 2

z-score for a particular value:

(that value - mean)/standard deviation

Answer 3

(86-92)/(3) = ?

Answer 4

-2. thanks

Answer 5

Suppose the velocities of golf swings for amateur golfers are normally distributed with a mean of 95 mph and a standard deviation of 3.9 mph.

What is the difference in velocities between a golfer whose z-score is 0 and another golfer whose z-score is −1?

Answer 6

work backwards using the z-score formula to find the values

Answer 7

(x - 95)/3.9 = 0
(y - 95)/3.9 = -1

calculate x and y

Answer 8

um....

Answer 9

(x - 95)/3.9 = 0

multiply both sides by 3.9, what do you get?

Answer 10

i got it actually

Answer 11

ok great