AS/A2
Stats 1
Stats 2
S3
Topic 1:
Combinations of random variables
Graphing aX
The graphs of two Normal distributions are shown:
X~N(mean,var) in blue
and
Y~aX in red
. Vary the value of a and see what effect this has on the red graph.
Summary
If X ~ N(
m
,
s
2
) and Y ~ aX then:
Y ~ N(a
m
,a
2
s
2
)
Based on free Java applets from
JavaMath
Based on
free Java applets from