Dr. Dawn Wright

The Stats Files

Finite Population Correction factor

Finite Population Correction factor

The Finite Population Correction Factor, sometimes just called the FPC factor, is used when the sample size is large relative to the population size. For most situations, the population is so large, typical sample sizes are far too small to worry about the need for...

Single-sample z-test for the mean [7.4.30t]

Single-sample z-test for the mean [7.4.30t]

Here is a common problem from intro stats: [7.4.30t] A random sample of 100 observations from a population with a standard deviation of 44 yielded a sample mean of 108. Test the null hypothesis that μ = 100 against the alternative that μ > 100 at an alpha of 0.05....

How to State the Conclusion of Your Hypothesis Test

How to State the Conclusion of Your Hypothesis Test

The Easier Way After you have completed the statistical analysis and decided to reject or fail to reject the Null hypothesis, you need to state your conclusion about the claim.   1. To get the correct wording, you need to recall which hypothesis was the claim.   If...

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