Statistics and probability experiments

Question 1 of 10

The mean of a frequency distribution is found by

Question 2 of 10

The median of a cumulative frequency curve for 40 values is read at the

Question 3 of 10

For the ordered data 2, 4, 5, 7, 8, 10, 12, find the interquartile range.

Question 4 of 10

What is the mode of 2, 4, 4, 5, 5, 5, 6?

Question 5 of 10

A die is thrown 60 times and shows a 6 on 13 of them. What is the relative frequency of a 6?

Question 6 of 10

Find the median of 12, 5, 9, 15, 7 and 10.

Question 7 of 10

A spinner lands on red 30 times in 120 spins. What is the relative frequency of red?

Question 8 of 10

The variance of 3, 5, 7, 9, 11 is

Question 9 of 10

The modal class of the distribution 0–9 (5), 10–19 (12), 20–29 (8), 30–39 (3) is

Question 10 of 10

In a pie chart of 180 pupils, what angle does a group of 45 pupils get?