Which measure of variation is very sensitive to extreme values?

a) Range

b) Mean

c) Histogram

d) Median

a) Range

Step-by-step explanation:

The range is the difference between the highest and the lowest value of a set, so it is sensitive to extreme values. That is, you can have two sets with the same mean, but with very different spacings.

For example, two grades:

set A = {40, 50, 50, 60}

set B = {0, 50, 50, 100}

The set B has a way higher range (100) than set A (20), that is, the range is sensitive to extreme values.

So the correct answer is:

a) Range