For a standardized normal distribution, calculate P(-1.28

Question

For a standardized normal distribution, calculate P(-1.28 < z < 1.75).
A) 0.3997
B) 0.4599
C) 0.1404
D) 0.8596

Quizplus · Accepted Answer

To find P(-1.28 < z < 1.75), we look up the z-scores in the standard normal distribution table. The table gives us the area to the left of a z-score. For z = -1.28, the area to the left is approximately 0.1003, and for z = 1.75, it's approximately 0.9599. To find the probability between these z-scores, we subtract the smaller area from the larger area: 0.9599 - 0.1003 = 0.8596.

For a Standardized Normal Distribution, Calculate P(-1