Chapter 7 Revision- Averages 2

The train fare from Reading to London was £20 in 2019. In 2020 it is £20.70. Calculate the index number for 2020 using 2019 as the bas year.

In 2019 where were 640,370 births in the UK. The total population was 67 million. What is the crude birth rate for the UK in 2019? (Give your answer to 2 d.p.)

Calculate the geometric mean of 3 and 27.

• 9

• 10

• 12

• 15

The value of a house increases by 3% in year 1, 2.5% in year 2 and 0.5% in year 3. What is the average % increase for the 3 years? (Give your answer to 2 d.p.)

• 1.94%

• 2%

• 1.55%

• 2.5%

Coursework = 30% ​

Written Exam= 70%​

Pass mark= 55%​

​

Student 1 ​

Coursework= 90%​

Exam= 45%​

​

Calculate the weighted mean to find their overall percentage?

• 55%

• 58.5%

• 67.5%

• 60%

Which of these averages can be shown on a quality control chart?

• Mean

• Mode

• Geometric Mean

• Average Seasonal Effect

From which type of graph can you calculate the size of the seasonal effect?

• Histogram

• Time Series

• Frequency Polygon

• Quality Assurance Chart