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Unformatted text preview: sults in your experiment.
In the double coin toss exercise, you have 3 possible results: two heads, two tails, or one of each.
Therefore, there are two degrees of freedom for this experiment.
In a sense degrees of freedom is measuring how many classes of results can “freely” vary their
numbers. In other words, if you have an accurate count of how many 2-heads, and 2-tails tosses
were observed, then you already know how many of the tosses ended up as mixed head-tails, so
the third measurement provides no additional information.
Interpreting the Chi Square Value
With the Chi-square calculation table completed, you would look up your Chi-square value on
the Chi-square Distribution table at the back of this activity. Biol 302, Fall 2013
Probability = p
Which column do we use in the Chi-square Distribution table?
The columns in the Chi-square Distribution table with the decimals from .995 through .005 refer
to probability levels of the Chi-square.
For instance, 3 events were observed in our coin toss exercise, so we already calculated we
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