How do i compute the mean and median grades for the grade qu

How do i compute the mean and median grades for the grade quiz of 72,84,61,95,92,98,87,84

Solution

Ordering the data,

61
72
84
84
87
92
95
98

As

Mean = Sum(x)/n

Then, as there are n = 8 points here,

Mean = (61+72+84+84+87+92+95+98)/8 = 84.125 [ANSWER, MEAN]

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The median is the average of the two middle values here, the 4th and 5th ones, 84 and 87. Thus,

Median = (84+87)/2 = 85.5 [ANSWER]