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Statistics Unit 4

Unit 4 Sampling Distribution Population Proportion

Type of Distribution The exact sampling distribution of p, valid for any sample size, is binomial. The sampling distribution of p can be approximated by a normal distribution whenever the sample size is large Large if nп > = 5 and n(1-п)>=5
With very small (approaching 0) or very large (approaching 1) values of п , much larger samples are needed.
Since its expected value is equal to the population parameter to be estimated, the sample proportion is said to be an _________ _______ for the population proportion. unbiased estimator
A finite population is treated as infinite if n/N<0.05
example page 72
Relationship Between the Sample Size and the Standard Error Whenever the sample size is increased, the standard error of a point estimator for any population parameter (such as п or y) decreases.
Created by: NikaKirillova



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