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) 0.4884
B) 0.7557
C) 1.54
D) 0.2211

Quizplus · Accepted Answer

Using a standard normal distribution table or a calculator, we find that the area to the left of -0.73 is 0.2317 and the area to the left of 2.27 is 0.9884. Therefore, the area between -0.73 and 2.27 is 0.9884 - 0.2317 = 0.7567. Rounded to four decimal places, the answer is 0.7557, which corresponds to choice B.

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