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Chapter 7

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**preview**shows half of the first page. to view the full**3 pages of the document.**MGCR 271 β Business Statistics

Chapter 7: Inference for Distributions

π-Tests

The one-sample π‘ procedures do inference about one mean.

The two-sample π‘ procedures compare two means.

Matched pairs studies use one-sample procedures because you ο¬rst create a single sample by

taking the differences in the responses within each pair.

These π‘ procedures are among the most common methods of statistical inference.

The π‘ procedures require that the data be random samples and that the distribution of the

population or populations be Normal.

π‘ procedures are widely used because they are not very strongly affected by lack of Normality.

If you canβt regard your data as a random sample, the results of inference may be of little value.

Recognition

Recognize when a problem requires inference about a mean or comparing two means.

Recognize from the design of a study whether one-sample, matched pairs, or two-sample

procedures are needed.

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