Measures of dispersion

Question 1 of 10

The marks of five students are 7, 9, 10, 11, 13. Calculate (a) the mean, (b) the variance, (c) the standard deviation correct to 2 decimal places.

Question 2 of 10

If all values are equal, the standard deviation is 0.

Question 3 of 10

The marks of five students are 7, 8, 9, 10, 11. Calculate (a) the mean, (b) the variance, (c) the standard deviation correct to 2 decimal places.

Question 4 of 10

The marks of five students are 11, 12, 13, 14, 15. Calculate (a) the mean, (b) the variance, (c) the standard deviation correct to 2 decimal places.

Question 5 of 10

Variance is measured in

Question 6 of 10

Find the mean of 8, 10, 12.

Question 7 of 10

Find the mean of -1, 5, 11.

Question 8 of 10

Standard deviation can be negative.

Question 9 of 10

Find the variance of 6, 6, 10, 10.

Question 10 of 10

Find the variance of 5, 5, 9, 9.