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Level 3-4 Data Handling - Frequency Diagrams
A pie chart is just one type of frequency diagram.

Level 3-4 Data Handling - Frequency Diagrams

Hey there! So, you've gathered some cool information, but now what? Let's talk about a fun way to show it off - with frequency diagrams! In this awesome KS3 Maths quiz, we'll learn how to read and make these diagrams.

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Data is like a secret code - it only becomes useful when we understand it. That's where frequency diagrams come in! Imagine pie charts, bar charts, line graphs, and pictograms - they're like superhero disguises for our data. Each symbol (like a slice of pie or a bar) tells a story about the info we've collected. It could be about people's answers in a survey, hours of daylight, temperature, or anything else you want to show.

Exciting news! We've got a quiz to help you become a frequency diagram expert. It covers all sorts of diagrams that make data super cool. Take your time, read each question carefully, and good luck!

1.
A frequency diagram shows the telephone lines in a number of call centres. ☎ represents a fixed number of lines. This sort of diagram is called a .......
bar chart
line graph
pictogram
pie chart
The clue is in the word - picto = picture
2.
One ☎ represents 20 'phone lines. The pictogram shows 4 symbols for the Ayford call centre. How many lines are there at Ayford?
4
20
40
80
4 x 20 = 80
3.
The Beeston centre has 70 'phone lines. How many symbols are needed to represent Beeston?
31⁄2
7
71⁄2
10
31⁄2 x 20 = 70
4.
The midnight temperatures, in °C, are recorded daily for a week. Which diagram is best for displaying this data?
Bar chart
Line graph
Pictogram
Pie chart
5.
Temperature is measured on the vertical axis. What goes on the horizontal axis?
Week
Month
Day
Year
The clue is in the word - daily
6.
The recorded temperatures were: Mon 3°, Tue 2°, Wed 0°, Thu 1°, Fri 1°, Sat -1°, Sun -2°. What was the range of temperatures for the week?
3°
4°
5°
6°
The range is the difference between the highest and lowest values. When negative numbers are involved, it's best to look at the number line
7.
A bar chart records the frequency and length of Tina's text messages (max length = 160 characters). The width of each bar, in characters, should be .......
10
20
50
100
This gives a sensible maximum of 8 bars
8.
Tina sends T texts. Which of these describes the category 'more than 20 but no more than 40 characters'?
20 ≤ T ≤ 40
20 < T < 40
20 < T ≤ 40
20 ≤ T < 40
The symbol ≤ means 'less than or equal to'
9.
On the vertical axis of the bar chart, 1 cm represents 5 texts. Tina sent 25 texts of 20 < T ≤ 40. How high is the bar for this category?
2 cm
4 cm
5 cm
10 cm
25 ÷ 5 = 5
10.
Joining up the mid points of all the bars forms a frequency .......
graph
polygon
chart
table
Frequency polygons can be used to compare patterns in linked bar charts
You can find more about this topic by visiting BBC Bitesize - Representing data

Author:  Frank Evans
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