1C_1 Statistics Revision

The stem-and-leaf diagram shows the distribution of the scores obtained by a group of students in a test, where x, y and z are non-negative integers less than 10. Find the percentage of students with scores above 70 marks.

• cannot be determined

The back-to-back stem-and-leaf diagram shows the results of S1A students and S1B students in a test. If the passing score was 60 marks, find the difference between the numbers of students who got a pass in S1A and S1B.

• 6

• 7

• 9

• 28

The pie chart shows the sales volume of different colours of T-shirts in a sportswear store. If the sales volume of red T-shirts is 480, find the sales volume of green T-shirts.

• 100

• 400

• 640

• 1920

The pie chart shows the distribution of the monthly expenditure of Wilson. What percentage of the monthly expenditure is the rent?

The broken-line graphs show the results of Ivy and Kevin in five History tests. What is the greatest difference between their results in the same History test?

• 10 marks

• 20 marks

• 30 marks

• 40 marks

The broken-line graph shows the sales of a company from 2011 to 2015. Find the percentage decrease in the sales from 2012 to 2015.

The broken-line graph shows the numbers of items sold by a salesman last week. How many items did the salesman sell in total last week?

• 32

• 33

• 34

• 35

The compound bar chart shows the number of S1 students who have passed an examination. What percentage of them are boys?

• 40%

• 48%

• 52%

• 60%

The compound bar chart shows the numbers of students in a tutorial centre from 2013 to 2016. What percentage of the students in 2013 are girls?

• 20%

• 30%

• 40%

• 60%

The compound bar chart shows the scores of three students in a test. Find the score of Nancy in paper 2.

• 6 marks

• 24 marks

• 44 marks

• 68 marks