Finite Math standard random

Question

For the standard random variable Z, what is the value of Pr[0.74 < Z < 1.27]?

A.-.1276

B..1276

C..2552

D..53

E..8980

Answer 1

最愛解答

The answer: B. 0.1276

Pr[0.74 < Z < 1.27]

= Pr[Z < 1.27] - Pr[Z < 0.74]

= 0.8980 - 0.7704

= 0.1276

Normal table used:

http://www.gopixpic.com/1240/normal-distribution-t...