Answer
P(Y $\geq$ 8) = time for mile in 8 minutes or more
Calculating z:
z = $\frac{x-μ}{σ}$
= $\frac{8-7.11}{0.74}$
= 1.20
Determining P(z $\gt$ 1.20) from Table A, we get:
P(z $\gt$ 1.20) = 1 - P(z $\lt$ 1.20)
= 1 - 0.8849 = 0.1151
Work Step by Step
As given above
