Suppose the test score of students in a class are normally distributed with a mean of 86 and a standard deviation of 4. What is the z-score for a student that scored 76 on a test

the answer is - 2.5

Step-by-step explanation:

Step 1:

Formula for z-score is:

z = (x-mean) / standard deviation

where x is the score for which z-score is required

Step 2:

x=76

mean=86

standard deviation=4

therefor;

z = (76-86) / 4

z = (-10) / 4

z = (-2.5)