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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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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
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