If z is a standard normal variable, find the probability: $P ( - 0.73

Question

If  z  is a standard normal variable, find the probability: $P ( - 0.73 < z < 2.27 )$
A)  0.7557 
B)  1.54 
C)  0.4884 
D)  0.2211

Quizplus · Accepted Answer

To find the probability that $z$ is between -0.73 and 2.27, we look up the corresponding values in the standard normal distribution table or use a calculator. The value for $z = 2.27$ is approximately 0.9883 and for $z = -0.73$ is approximately 0.2327. Subtracting these gives $0.9883 - 0.2327 = 0.7556$, which rounds to 0.7557, matching option A.

If Z Is a Standard Normal Variable, Find P(−0.73<z<2.27)P ( - 0.73 < z < 2.27 )P(−0.73<z<2.27)

If Z Is a Standard Normal Variable, Find $P ( - 0.73 < z < 2.27 )$