BKSB Handling Data and Statistics 3

Question 1

A shop records daily sales (in $): 120, 85, 200, 95, 150, 85, 130. What is the mode?

Accepted Answer

85

Answer

The mode is the most frequently occurring value; 85 appears twice, all others once.

Question 2

A scatter diagram shows a strong positive correlation. Which statement best describes this?

Accepted Answer

As x increases, y increases

Answer

A positive correlation means both variables increase together.

Question 3

A grouped frequency table shows 15 values in the 10–20 interval and 25 values in the 20–30 interval. What is the total number of values in these two groups?

Accepted Answer

40

Answer

Total = 15 + 25 = 40 values.

Question 4

The mean of five numbers is 14. Four of the numbers are 10, 12, 16, and 18. What is the fifth number?

Accepted Answer

14

Answer

Total sum = 5 × 14 = 70; known sum = 10+12+16+18 = 56; fifth number = 70 − 56 = 14.

Question 5

A two-way table shows 30 boys and 20 girls in Year 10, and 25 boys and 35 girls in Year 11. How many students are in Year 11?

Accepted Answer

60

Answer

Year 11 total = 25 boys + 35 girls = 60 students.

(BKSB) Basic and Key Skills Builder Practice Test

(BKSB) Basic and Key Skills Builder Practice Test

BKSB Handling Data and Statistics 3