# Normal Distribution and Populations

Please help with the following problems involving normal distribution and populations.

Based off the three requirements that must be met before an analysis of variance test (ANOVA) can be used:

1. Samples must be randomly selected from the populations to be evaluated.

2. All populations from which the samples are selected must have a normal probability distribution.

3. All the populations from which samples are selected must have the same variance.

How might one know if the samples follow a normal distribution?

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Problem: How might one know if the samples follow a normal distribution?

This distribution, with its symmetrical "bell-shaped" density curve is of fundamental importance in both statistical theory and practice. Its roles include the following

(i) it is a good model for ...

#### Solution Summary

This posting helps with a problem involving normal distribution and populations. The solution examines normal distribution and populations using an ANOVA test. It is determined if the populations are normally distributed.