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# How to calculate the sum of squares treatment (SSTr) and calculate the mean squares treatment (MSTr)?

Question:

A red-eared slider is a type of turtle indigenous to the midwestern United States. They have an average length ranging from 15 to 20 cm. A zoologist would like to compare the size of turtles from three different adjoining states: Missouri, Oklahoma, and Arkansas. Samples of twenty turtles found in each of the three different states were measured.

I added the table

How to:

Calculate the sum of squares treatment (SSTr)?

and

Calculate the mean squares treatment (MSTr)?

Please help

Thank you

### 1 Answer

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