11.1b Range and Outliers

Range - the range of the data set is the largest value minus the lowest value.

Find the range of the data set.

90, 80, 70, 65, 88, 93, 78, 83, 79, 92

Find the range of the data set.

5, 3, 4, 8, 8, 7, 9, 9, 10, 7, 9, 9

Mean - remember mean is the average of the numbers.

Find the mean of the data set

10 5 6 7 8 9 7 8 8 10

Outlier - is a value that is much greater or smaller than the other values of the data set.

Is there an outlier? If so what is it?

73 75 89 91 87 79 82 83 86 92

Is there an outlier? If so what is it?

92, 88, 96, 86, 89, 90, 95, 97, 42, 83

Remember we said outliers affect the mean? So we will find the mean with and without the outlier.

In this data set we said 42 is the outlier

92, 88, 96, 86, 89, 90, 95, 97, 42, 83

So that 32 changed the average alot.

Imagine that data set was weight of a turtle. Most are all small and weigh about 6 pounds. Then we got a HUGE one at 32 pounds. That huge turtle would be the outlier!