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Level 2
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Histograms & frequency density
13 questions
Lesson
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The table shows information about the masses,
m
m
m
kilograms, of 70 suitcases checked in at an airport desk.
Mass,
m
m
m
(kg)
Frequency
0
<
m
≤
20
0 < m \le 20
0
<
m
≤
20
36
20
<
m
≤
30
20 < m \le 30
20
<
m
≤
30
22
30
<
m
≤
60
30 < m \le 60
30
<
m
≤
60
12
(a)
Work out the frequency density of each class.
(b)
Ravi says, "The class
0
<
m
≤
20
0 < m \le 20
0
<
m
≤
20
must have the tallest bar on the histogram, because it has the largest frequency."
Is Ravi correct? Explain your answer.
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Level 2
3 marks
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Interpreting histograms
12 questions
Lesson
Not started
Mark as done
10
20
30
40
50
60
0.5
1
1.5
2
2.5
3
Time (minutes)
Frequency density
The histogram gives information about the times, in minutes, that some students spent on homework one evening.
(a)
Work out the number of students who spent between
20
20
20
and
40
40
40
minutes on homework.
(b)
Work out the total number of students.
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Level 2
4 marks
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