# Ch08_1 - Chapter 8 Part I Sampling Distributions and...

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Chapter 8 1 Chapter 8 Part I Sampling Distributions and Estimation

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Chapter 8 2 Sampling Variability Sample statistics will vary from sample to sample. Population parameters remain fixed as long as the population remains the same
Chapter 8 3 Sampling Variation Sampling Variation Consider eight random samples of size Consider eight random samples of size n n = = 5 from a large population of GMAT scores 5 from a large population of GMAT scores for MBA applicants. for MBA applicants. The sample means ( The sample means ( x x i ) tend to be close to the ) tend to be close to the population mean ( population mean ( μ μ = 520.78). = 520.78).

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Chapter 8 4 The value of a statistic can change whenever we take a new random sample. Sampling variability exists in every sampling process. However: sampling variability can follow a predictable pattern provided we take random samples.
Chapter 8 5 Sampling Distribution When we use a sample statistic to make conclusions about a population parameter, we are interested in the sampling distribution of the statistic.

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## This note was uploaded on 12/13/2010 for the course LEEDS BCOR 1020 taught by Professor Heatheradams during the Spring '08 term at Colorado.

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Ch08_1 - Chapter 8 Part I Sampling Distributions and...

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