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 meansf or samples fo size 40.
1
µ = 2.0 and σ 2 = 3000
f (x)
22
0.9969
0.0031
2.0
2.05 X(40)
Approximate distribution of meansf or samples fosize 20.
1
µ = 2.0 andσ 2 = 1500
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