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In Depth Information

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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