NBT Statistics and Probability

Question 1

What is the mean of the following data set: 12, 15, 18, 22, 28?

Accepted Answer

19

Answer

18

Answer

20

Answer

18.5

Question 2

A fair die is rolled once. What is the probability of getting a number greater than 4?

Accepted Answer

1/3

Answer

1/6

Answer

1/2

Answer

2/3

Question 3

What is the median of: 3, 7, 9, 12, 15, 18, 21?

Accepted Answer

12

Answer

9

Answer

15

Answer

13.5

Question 4

If P(A) = 0.4 and P(B) = 0.3, and A and B are independent events, what is P(A and B)?

Accepted Answer

0.12

Answer

0.7

Answer

0.1

Answer

0.70

Question 5

The mode of a data set is:

Accepted Answer

The most frequently occurring value

Answer

The middle value

Answer

The average value

Answer

The range of values

Question 6

In a class of 30 learners, 18 play soccer and 12 play cricket. If 6 play both sports, how many play neither?

Accepted Answer

6

Answer

0

Answer

4

Answer

8