Week 9 - Measures of dispersion, and Graphing

Question 1

If the standard deviation of the dataset is 0, what does this tell you about the values that makeup the dataset?

Answer 1

All the values in the dataset are the same

Question 2

How to calculate variance and standard deviation?

Question 3

If the standard deviation of a dataset is 5.6 then….

Answer 3

The variance must be greater than 5.6

Question 4

give examples of measures of dispersion

Answer 4

• range
• interquartile range
• variance
• standard deviation

Question 5

What is a benefit of plotting frequencies?

Answer 5

Allows us to see the shape of distribution