OLNA - Online Literacy and Numeracy Assessment Numeracy: Statistics and Probability Questions and Answers

Question 1

A bag contains 15 marbles: 6 are red, 5 are blue, and 4 are green. If one marble is drawn at random, what is the probability that it is blue?

Accepted Answer

1/3

Answer

6/15

Answer

4/15

Answer

1/5

Question 2

A student's test scores for the semester are: 88, 92, 84, 92, 78. What is the median of these scores?

Accepted Answer

88

Answer

92

Answer

86.8

Answer

14

Question 3

The table below shows the preferred sport for a group of Year 9 and Year 10 students. How many Year 10 students prefer Soccer?

Accepted Answer

18

Answer

45

Answer

28

Answer

32

Question 4

A weather forecast predicts a 75% chance of rain on Tuesday, a 1/2 chance of rain on Wednesday, and a 0.8 chance of rain on Thursday. On which day is it most likely to rain?

Accepted Answer

Thursday

Answer

Tuesday

Answer

Wednesday

Answer

The chance is equal on all days

Question 5

The daily maximum temperatures (in degrees Celsius) recorded for one week were: 25, 28, 22, 31, 27, 24, 29. What is the range of these temperatures?

Accepted Answer

9

Answer

22

Answer

31

Answer

7

Question 6

A scatter plot shows the relationship between the hours students spend studying and their final exam scores. The points on the plot generally trend from the bottom left to the top right. Which of the following is the best interpretation of this plot?

Accepted Answer

There is a positive correlation between study hours and exam scores.

Answer

There is a negative correlation between study hours and exam scores.

Answer

There is no correlation between study hours and exam scores.

Answer

Studying for more hours causes a student to fail.