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olga nikolaevna [1]
4 years ago
9

The grades on a geometry midterm at Santa Rita are roughly symmetric with u = 82 and o = 4.0.

Mathematics
1 answer:
Ainat [17]4 years ago
6 0

Answer:

z-score for Emily's exam grade is 2.50

Step-by-step explanation:

Z score helps to determine position of any  observed data with respect to mean of data, when it is measured in terms of standard deviation.

Formula for  z score is given by

z = (data from sample - mean)/ standard deviation

Given in the problem

mean = 82

standard deviation = 4.0

sample score = 92

Z = (92-82)/4 = 10/4

Z = 2.5

z-score for Emily's exam grade is 2.50

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