Question

the table shows the number of incorrect answers given by nine students on a standardized test which of the following measures would make the number of missed questions appear as a small as possible

Answer 1

Let's take them one after the other

To calculate the mean:

Mean = 4 +20+ 5 +10+ 21+ 18 +10+ 11+ 16 / 9

Mean= 115/9= 12.7

To calculate the median;

Median: position (n+1)/2=(9+1)/2=5

This implies it is the fiifth value after ordering them from least to gratest

4, 5, 10, 10, 11, 16, 18, 20, 21

The fifth observation is 11, that's the median

Calculate the range;

Range = highest - lowest = 21 - 4 = 17

Mode = bi modal = 10

The answer is the Mode which is 10

The correct option is the last option : Mode