Question

Please Help and I will Medal you

The table shows data for a class's mid-term and final exams.

Mid-Term Final
98 99
98 93
93 93
90 93
88 88
82 86
78 80
75 78
75 78
70 78
68 72

Which data set has the largest standard deviation?
A. Mid-term exams
B. Final exams
C. They have the same standard deviation.
D. There is not enough information.

Answer 1

A)Mid-Term exams has the largest standard deviation.

Mean of the first array is = 83

Formula = sqrt( 1/N sumofall (mean - each number)^2)

For the first one, Standard deviation is = 10.82

The standard deviation for the second one is =7.2