Measures of dispersion

Question 1 of 10

Standard deviation can be negative.

Question 2 of 10

The range of the data 22, 57, 9, 23 is ___.

Question 3 of 10

If every value in a data set is increased by 5, the standard deviation

Question 4 of 10

Find the variance of 2, 6, 8, 12.

Question 5 of 10

Find the variance of 1, 3, 5, 7.

Question 6 of 10

Find the mean of 6, 9, 12.

Question 7 of 10

Variance is measured in

Question 8 of 10

The range of the data 27, 34, 20, 28 is ___.

Question 9 of 10

The marks of five students are 6, 8, 9, 10, 12. Calculate (a) the mean, (b) the variance, (c) the standard deviation correct to 2 decimal places.

Question 10 of 10

Find the standard deviation of 2, 8, 14, correct to 2 decimal places.