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Fig. 5.10
Formula labels for the two-group t-test
You now need to compute the values of the above formulas in the following cells:
D13:
the result of the formula needed to compute cell B13 (use 2 decimals)
D16:
the result of the formula needed to compute cell B16 (use 2 decimals)
D19:
the result of the formula needed to compute cell B19 (use 2 decimals)
D22:
=SQRT(D19) (use 2 decimals)
This formula should give you a standard error (s.e.) of 1.98.
D25:
1.96
(Since df = n1 ? n2-2, this gives df = 109-2 = 107, and the critical t is,
therefore, 1.96 in Appendix E).
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