Statistics Test
Name___________________________________
Date________________________
- Find the mean of the set {3,7,8,6}? (click for answer)
The first step is to add the three numbers that is, 3 + 7 + 8 + 6 = 24.
The value of the addition is 24.
No. Of quantities in the set = 4.
Therefore, the mean is 24/4 = 6.
- Find the median of the set {3, 7, 6, 12, 9} (click for answer)
The first step would be to sort them in increasing order
that is, 3, 6, 7, 9, 12.
The middle number is 7.
With odd rule, the median is 7.
- Find the median of the set {3, 5, 10, 6, 15, 11} (click for answer)
Sorting the set in increasing order, we get, 3, 5, 6, 10,
11, 15
The two middle number are 6 and 10.
Sum of those two numbers = 6 + 10 = 16.
Dividing the value by 2, we get, 16/2 = 8.
Therefore the median is 8.
- Get the mode from the set {1, 6, 4, 6, 1, 9, 7, 6} (click for answer)
Sorting the numbers we get, 1, 1, 4, 6, 6, 6, 7, 9.
6 is the mode as it has appeared the most number of times.
- Calculate the range of the set {2, 8, 15, 26, 4, 9} (click for answer)
The largest number in the set is 26 and the smallest number
is 2.
Therefore, the difference is 26 – 2 = 24.
The range is 24.