LANTITE Statistics and Probability

Question 1

What is the mean of the numbers 4, 7, 9, 12 and 13?

Accepted Answer

9

Answer

The sum is 45, and 45 ÷ 5 = 9.

Question 2

What is the median of the data set 2, 3, 5, 8, 10, 12?

Accepted Answer

6.5

Answer

With an even number of values, the median is the average of the two middle values: (5 + 8) ÷ 2 = 6.5.

Question 3

A bag holds 4 red, 6 blue and 5 green counters. One counter is drawn at random. What is the probability it is NOT blue?

Accepted Answer

3/5

Answer

There are 15 counters and 9 are not blue, so the probability is 9/15 = 3/5.

Question 4

What is the mode of 2, 3, 3, 5, 7, 3, 9?

Accepted Answer

3

Answer

The mode is the most frequent value. 3 appears three times.

Question 5

A pie chart shows that 25% of 480 students walk to school. How many students walk?

Accepted Answer

120

Answer

25% is one quarter, and 480 ÷ 4 = 120.

(LANTITE) Literacy and Numeracy Test for Initial Teacher Practice Test