Statistics

Question 1 of 10

The interquartile range is

Question 2 of 10

The mean of 5, 7, 9, 11 is

Question 3 of 10

The standard deviation of a data set is

Question 4 of 10

The class mark of the interval 10–19 is

Question 5 of 10

The variance of 1, 3, 5 is

Question 6 of 10

To estimate the mean of grouped data, each class is represented by its

Question 7 of 10

The mean of 10 numbers is 15. If each number is multiplied by 2 and then 3 is added, the new mean is

Question 8 of 10

Find the variance of 2, 4 and 6.

Question 9 of 10

The standard deviation is the

Question 10 of 10

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