Consider a random variable, z, that has a standardized normal distribution. Determine P (1.28

Question

Consider a random variable, z, that has a standardized normal distribution. Determine P (1.28 < z < 2.33).
A) 0.0126
B) 0.3997
C) 0.0904
D) 0.4901

Quizplus · Accepted Answer

The probability that z is between 1.28 and 2.33 in a standardized normal distribution can be found by looking up the values in a standard normal table or using a calculator designed for statistics. The value for z=1.28 is approximately 0.8997 and for z=2.33 is approximately 0.9901. Subtracting these gives 0.9901 - 0.8997 = 0.0904, which represents the area under the curve between z=1.28 and z=2.33.

Consider a Random Variable, Z, That Has a Standardized Normal