The Grades of the student are 83, 68, 87, 71, 89, 54, 92
The lowest grade is 54, so we will drop it off
The mean = sum of grades/no. of grades
The sum = 83 + 68 + 87 + 71 + 89 + 92 = 490
The no. = 6
Then the mean = 490/6 = 81.66666
Round it to the nearest 1 d.p.
The mean = 81.7
To find the median you must arrange the grades from smallest to greatest, then
Take the middle number
68, 71, 83, 87, 89, 92
Since there are 6 numbers, then we have 2 numbers in the middle 83 and 87
The median will be the average of them
The median = (83 + 87)/2 = 170/2 = 85
The median = 85
