Exercise

Evaluating the effectiveness of stem cell treatment (cont.)

Conduct the hypothesis test and compute the p-value for evaluating whether there is a difference between the mean heart pumping capacities of sheep's hearts in the control and treatment groups.

Since we're testing for a difference, the order in which we subtract matters. We can specify it using the order argument in the calculate() function. For example, to achieve group1 - group2 use order = c("group1", "group2").

Instructions 1/2

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Generate 1000 differences in means via randomization.

Specify change versus treatment group.
Use an independence hypothesis.
Generate 1000 replicates via permutation.
Calculate the difference in means (esc first, then ctrl).