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bitty

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## Homework Statement

I know that for a Chi Square test to adequately describe a distribution, you need each bin to have an estimated frequency > 5. As a rule of thumb though, do I want to pool the bins with less than 5 estimated frequency so as to maximize the number of bins or minimize them?

For instance say we have:

(first column is the bin number, second column is estimated frequency of that bin)

Bin# Estimated Frequency

1 6

2 3

3 4

4 3

5 3

Which way would we pool bins?

Method 1)

Bin # Estimated Frequency

1 6

2+ 13

or

Method 2)

Bin # Estimated Frequency

1 6

2-3 7

4-5 6