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Posted by **stan** on Wednesday, December 12, 2012 at 3:25am.

A’s B’s C’s D’s F’s

25 35 60 30 20

- statistics -
**PsyDAG**, Wednesday, December 12, 2012 at 11:33amX^2 = ∑ (O-E)^2/E, where O = observed frequency and E = expected frequency.

∑ = sum of all the cells.

E = (column total * row total)/grand total

df = n - 1, where n = number of cells

Look up value in X^2 table in the back of your textbook.

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