Question

On a recent test, students had the following scores: 85, 100, 92, 96, 87, 94, 75. For these scores, find: a) Mean b) Variance = sum of (Difference from the Mean)^2 c) Standard Deviation = Square root of the variance

Answer 1

a. aprox. 89.86
b. 25
c. 5

Answer 2

Mean= 89.9

Explanation:

B. n:7

C. sum of ( difference form the Mean) divided by(n): 629 = variance D. standard deviation= 69.1