LECTURE NOTES on PROBABILITY and STATISTICS Eusebius …
LECTURE NOTES
on
PROBABILITY and STATISTICS
Eusebius Doedel
TABLE OF CONTENTS
SAMPLE SPACES
Events
The Algebra of Events
Axioms of Probability
Further Properties
Counting Outcomes
Permutations
Combinations
1
5
6
9
10
13
14
21
CONDITIONAL PROBABILITY
Independent Events
45
63
DISCRETE RANDOM VARIABLES
Joint distributions
Independent random variables
Conditional distributions
Expectation
Variance and Standard Deviation
Covariance
71
82
91
97
101
108
110
SPECIAL DISCRETE RANDOM VARIABLES
The Bernoulli Random Variable
The Binomial Random Variable
The Poisson Random Variable
118
118
120
130
CONTINUOUS RANDOM VARIABLES
Joint distributions
Marginal density functions
Independent continuous random variables
Conditional distributions
Expectation
Variance
Covariance
Markov¡¯s inequality
Chebyshev¡¯s inequality
142
150
153
158
161
163
169
175
181
184
SPECIAL CONTINUOUS RANDOM VARIABLES
The Uniform Random Variable
The Exponential Random Variable
The Standard Normal Random Variable
The General Normal Random Variable
The Chi-Square Random Variable
187
187
191
196
201
206
THE CENTRAL LIMIT THEOREM
211
SAMPLE STATISTICS
The Sample Mean
The Sample Variance
Estimating the Variance of a Normal Distribution
Samples from Finite Populations
The Sample Correlation Coefficient
Maximum Likelihood Estimators
Hypothesis Testing
246
252
257
266
274
282
288
305
LEAST SQUARES APPROXIMATION
Linear Least Squares
General Least Squares
335
335
343
RANDOM NUMBER GENERATION
The Logistic Equation
Generating Random Numbers
Generating Uniformly Distributed Random Numbers
Generating Random Numbers using the Inverse Method
362
363
378
379
392
SUMMARY TABLES AND FORMULAS
403
SAMPLE SPACES
DEFINITION :
The sample space is the set of all possible outcomes of an experiment.
EXAMPLE : When we flip a coin then sample space is
where
and
S = {H , T },
H denotes that the coin lands ¡±Heads up¡±
T denotes that the coin lands ¡±Tails up¡±.
For a ¡±fair coin ¡± we expect H and T to have the same ¡±chance ¡± of
occurring, i.e., if we flip the coin many times then about 50 % of the
outcomes will be H.
We say that the probability of H to occur is 0.5 (or 50 %) .
The probability of T to occur is then also 0.5.
1
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