Measures of dispersion

Question 1

What is range?

Answer 1

It tells us the spread of the data

Question 2

How can you calculate the range?

Answer 2

Largest-smallest+1

Question 3

What is a weakness of the range?

Answer 3

Doesn’t take into account all data

Question 4

What is variance?

Answer 4

Spread of data around the mean

Question 5

What does a large variance mean?

Answer 5

Data is spread/varied from the mean

Question 6

What does a small variance mean?

Answer 6

Data is not spread/varied from the mean

Question 7

What is a strength of the variance?

Answer 7

Takes all data into account

Question 8

What is a weakness of the variance?

Answer 8

Can be skewed by an anomaly

Question 9

What is the calculation for the variance?

Answer 9

Question 10

what is standard deviation?

Answer 10

average spread of data around the mean

Question 11

What is a large standard deviation?

Answer 11

Data is spread on average far from mean

Question 12

What is a small standard deviation?

Answer 12

Data is not very spread on average from the mean

Question 13

What is strength of standard deviation?

Answer 13

Reverts to a similar figure as the mean, so we can make a direct comparison

Question 14

What is the calculation of standard deviation?

Answer 14

Question 15

What is the steps to calculate standard deviation?

Answer 15