Core Mathematics

Question 1

1A die is thrown 120 times and a 6 appears 25 times. The relative frequency of a 6 is

Easy

A. 1/25 B. 5/24 C. 1/6 D. 25/6

Question 2

2Classes 0–9, 10–19, 20–29, 30–39 have frequencies 5, 12, 8, 3. Using midpoints, the estimated mean is about

Hard

A. 14.5 B. 19.5 C. 17.7 D. 15.6

Question 3

3What is the range of 18, 25, 11, 30 and 22?

Easy

A. 11 B. 30 C. 19 D. 7

Question 4

4Find the mean of 3, 7, 7, 9 and 14.

Easy

A. 9 B. 40 C. 8 D. 7

Question 5

5Relative frequency is

Easy

A. the number of times an event occurs divided by the number of trials B. always 1/2 C. the total number of trials D. the theoretical probability

Question 6

6The mean of a frequency distribution is found by

Easy

A. the most frequent value B. Σfx ÷ Σf C. the middle value D. Σx ÷ n only

Question 7

7A die is thrown 60 times. How many times would you expect to get a 4?

Easy

A. 6 B. 15 C. 4 D. 10

Question 8

8The mean of 6 numbers is 15. One number, 20, is removed. What is the mean of the rest?

Medium

A. 15 B. 16 C. 14 D. 13

Question 9

9What is the mode of 2, 4, 4, 5, 5, 5, 6?

Easy

A. 4 B. 5 C. 6 D. 4.43

Question 10

10Which average is most affected by an extreme value?

Easy

A. the mean B. the median C. the mode D. none of them