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(D4–D5)/D22 (use 2 decimals)
This formula should give you a value for the t-test of: 24.55.
Nest, check to see if you have rounded off all ﬁgures in D13: D28 to two
decimal places (see Fig. 5.11 ).
Results of the t-test formula for item #12 for introductory biology 101
Now, write the following sentence in D31–D34 to summarize the result of the
Since the absolute value of -4.55
is greater than the critical t of
1.96, we reject the null hypothesis
and accept the research hypothesis.
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