2.1.1
Random Experiment
Definition
2.1.2
An experiment that can result in different
outcomes, even though it is repeated in the same
manner every time, is called a random experiment.
Sample Spaces
Definition
The set of all possible outcomes of a random
ex

Probability of a Union
If A and B are two events, then
P A B P A P B P A B .
Mutually Exclusive Events
If A and B are mutually exclusive, then
P A B P A P B
Three Events
For three events A, B, and C,
P A B P A P B P C
P A B P A C P B C P A B C .
Mutual

HYPOTHESIS TESTING: TWO SAMPLE TESTS
Chapter Outline:
9.1 Hypothesis Testing on the differences
between means
RECALL THE PROCEDURE
1.
2.
3.
4.
5.
6.
7.
8.
State null hypothesis, H0
State alternative hypothesis, H1 or Ha
Decide on level of significance, .

UK1 BOCHEMICAL OXYGEN DEMAND (BOD)
1.0 Introduction
The biochemical oxygen demand (BOD) determination is an empirical test in which
standardized laboratory procedures are used to determine the relative oxygen requirements of
wastewater, effluents, and pol