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Dean Chalmers
Cambridge International
AS & A Level Mathematics:
Probability
& Statistics 1
Worked Solutions Manual
Frequeny density
(trainees per 1 minute)
125
100
75
50
25
0
2.55
2.85
3.05
3.25
Time taken (minutes)
3.75
Cumulative frequency (Number of light bulbs)
225
200
150
100
50
0
80
120
160
Days
200
240
280
Marks in Chemistry
Marks in Physics
Area (cm2)
0
10
20
30
40
Cumulative frequency (No. brackets)
250
200
150
100
50
–1.5 –1.0–0.5 0 0.5 1.0 1.5 2.0 2.5
Deviation (d degrees)
50
60
£
£
€
€
€
€
£
€
£
Ø
Ø
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