Question

I have a Statistics question?

Answer 1

N 1

Part a

68%

Divide by 2

68%/2=34%=34/100=0.34

using a z-score tables

we have that

z=0.994

N 2

50%

50%/2=25%=25/100=0.25

using a z-score tables

we have that

z=0.674

N 3

80%

80%/2=40%=40/100=0.40

using a z-score tables

we have that

z=1.282