Question

Set 1: 8, 15, 13, 7, 11, 17, 13
Median = 13
Lower quartile = 8
Upper quartile = 15
Range = 10
Interquartile range = 7


Set 2: 8, 15, 13, 7, 11, 17, 13, 100
Median = 13
Lower quartile = 9.5
Upper quartile = 16
Range = 93
Interquartile range = 6.5

Which set contains an outlier?

Which measure of spread was most impacted by the outlier?

Answer 1

Set two contains an outlier, which is 100
The measure of spread that was most impacted by the outlier is the range
This is because in set two, the median,both quartile and the interquartile range are all closely grouped together but the range is 93, which is far far away from any of those other values

Answer 2

Which set contains an outlier?  

✔ Set 2

Which measure of spread was most impacted by the outlier?  

✔ The range