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English Pages 188 [88] Year 2019
Dean Chalmers
Cambridge International AS & A Level Mathematics:
Probability & Statistics 2 Worked Solutions Manual
f (t)
1 11
0
22
t
f (x)
0.4
0
2.5
5
x
f (t)
1 4
0
6
10
t
f (x)
1 4
0
3
7
11
x
90
t
f (t) 1 90
0
Approximate distribution of means for samples o f size 40. 1 µ σ 2 = 3000 = 2.0 and f (x) 22
0.9969
0.0031
2.0
2.05 X(40)
Approximate distribution of means f or samples o f size 20. 1 µ σ 2 = 1500 = 2.0 and f (x) 22 0.974
0.026
2.0
2.05
X(20)
f(t) 0.5 0.4 0.3 0.2 0.1 0
0.5
Time (t mintues)
3
t