24.2 Tables, bar charts, pie charts and pictograms — Practise

1. A table has frequencies 7, 11 and 6. Find the total.

Answer: Total $=24$.

2. A class records these favourite fruits: 5 choose apples, 8 choose bananas and 3 choose pears. Name a suitable chart to compare the categories and work out the total responses.

Answer: A bar chart compares the separate categories. The total is $5+8+3=16$ responses.

3. A category has frequency 15 in a total of 60. Find its pie-chart angle.

Answer: $90^\circ$.

4. One pictogram symbol represents 5 votes. How many votes do 6 symbols represent?

Answer: 30 votes.

5. A group of 20 out of 80 choose walking. Find the sector angle.

Answer: $90^\circ$.

6. The ungrouped discrete data are 2, 5, 5, 7. Name a suitable chart and find the median.

Answer: A vertical line chart is suitable for ungrouped discrete numerical data. The median is $5$.

7. Each symbol represents 4 pupils. What does 2.5 symbols represent?

Answer: 10 pupils.

8. A bar chart shows 12 votes for red and 8 for blue. How many more chose red?

Answer: 4 more chose red.

9. Frequencies are 9, 6 and 5. Find the pie angle for frequency 6.

Answer: $108^\circ$.