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eehiram
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Homework Statement
My source textbook is the community college / junior college (confer: undergraduate-lower division)
probability and statistics textbook:
An Introduction to Mathematical Statistics and Its Applications, 2nd Edition
Authors: Richard J. Larsen, Morris L. Marx
1986 Prentice-Hall
[...] DeMoivre had already derived a quite different [appromixation to the binomial] [than Poisson] in his 1718 tract, Doctrines of Chance.
Like Poisson's work, DeMoivre's theorem did not initially attract the attention it deserved; it did catch the eye of Laplace, though, who generalized it and included it in his influential Theorie Analytique de Probabilites, published in 1812.
[See relevant equations for Theorem 4.3.1 (DeMoivre-Laplace) equation on Normal Distribution below...]
I would like to review easiest analyses of deviations from Normal Distribution?
Exempli gratia: mean, variance, efficiency, consistency, sufficiency?
Homework Equations
Theorem 4.3.1 (DeMoivre-Laplace)
Let X be a binomial random variable defined on n independent trials each having success probability p. For any numbers c and d,
[itex]
\lim_{n\rightarrow \infty} {P \Big(c < {\frac{X - np} {\sqrt{npq}}} < d \Big)} = \frac{1} {\sqrt{2\pi}} \int_c^d e^{\frac{-x^2} {2}} \,dx
[/itex]
The Attempt at a Solution
1. What are the easiest analyses of deviations from Normal Distribution?
Exempli gratia: mean, variance, efficiency, consistency, sufficiency?
a) (Section 4.3; Theorem 4.3.3)
(Mean is represented by μ)
Expected value E(x) can be calculated as:
E(X) = μ
b) (Section 4.3; Theorem 4.3.3)
Variance can be calculated as:
Var(X) = σ2
c) (Section 5.3-5.5; Definition 5.5.1)
Efficiency of estimators W1 and W2 can be compared as:
W1 is more efficient than W2 when:
Var(W2) < Var(W2)
Also, the comparison can be made:
Var(W2) / Var(W1)
d) (Section 5.7; Definition 5.7.1)
Consistency of an estimator Wn implies:
i. Wn is asymptotically unbiased;
ii. Var(Wn) converges to 0.
e) (Section 5.7; Definition 5.7.2; Theorem 5.7.1: Fisher-Neyman Criterion)
Determination of Sufficiency can be facilitated by way of: Fisher-Neyman Criterion.
[I can supply Definition 5.7.2; Theorem 5.7.1: Fisher-Neyman Criterion if requested... Or an explanation of Sufficiency.]
[Any other beginner's introduction to Estimation, Unbiasedness, and deviations from Normal Distribution will be welcomed.]
2. What is the frequency of departures from Normal Distribution when considering near-to-Normal Distribution data?
(BTW the data need not be real data, such as my textbook's examples of astronomical data.)
3. (Completely optional bonus round!)
How can the Gaussian Function be resolved, as the probability density function of the Normal Distribution?
[Thanks to any who reply, to any part of this post!]