Question

Can you please help me with number 7. I think I did this equation backwards

Answer 1

The formula to calculate the z-score is given by:

`z=(x-\mu)/(\sigma)`

Where

For part A

x=33

`z=(33-25)/(4)=2`

z-score =2

For part B

x=21

`z=(21-25)/(4)=(-4)/(4)=-1`

z-score= -1

For Part C

x=15

`z=(15-25)/(4)=-(10)/(4)=-2.5`

z-score=-2.5

For part D

x=39

`z=(39-25)/(4)=(14)/(4)=3.5`

z-score=3.5

For part E

x=31

`z=(31-25)/(4)=(6)/(4)=1.5`

z-score=1.5