A study was conducted to compare the effects of three levels of digitalis on the

Question

A study was conducted to compare the effects of three levels of digitalis on the levels of calcium in the heart muscles of dogs. Because general level of calcium uptake varies from one animal to another, the tissue for a heart muscle was regarded as a block, and comparisons of the three digitalis levels (treatments) were made within a given animal. The calcium uptakes for the three levels of digitalis, A, B, and C, were compared based on the heart muscles of four dogs. Here is part of the ANOVA table for these data.

Assuming a treatment effect is found, what is Tukey's yardstick at the 5% significance level? ______

11

Source Degrees
of freedom Sum of squares Mean square F Digitalis 2 9,024.86 4512.43 4.742 Dog 3 24,188.84 8062.9467 8.473 Error 6   5,709.56 951.5933 Total

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Explanation / Answer

Tykey' Post hoc test can not conduct using ANOVA table. It required raw data. Tykey's test is similar with t-test.

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