Choose the one alternative that best completes the statement or answers the question.Use a table of areas for the standard normal curve to find the required z-score.
-Find the z-score for which the area under the standard normal curve to its left is 0.40
A)0.25
B)-0.25
C)0.57
D)-0.57

Question

Choose the one alternative that best completes the statement or answers the question.Use a table of areas for the standard normal curve to find the required z-score.
-Find the z-score for which the area under the standard normal curve to its left is 0.40 
A)0.25
B)-0.25
C)0.57
D)-0.57

Quizplus · Accepted Answer

The z-score for which the area under the standard normal curve to its left is 0.40 is -0.25. This is because the standard normal distribution is symmetric around 0, and areas to the left of the mean (0) correspond to negative z-scores. An area of 0.40 to the left indicates a z-score below the mean, hence -0.25.

Choose the One Alternative That Best Completes the Statement or Answers