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Typical results, for example, show that a sample of n = 25 children who attend day care before starting school had an average score of M = 87 with SS = 1536 on a standardized math test for which the population mean is = 81
a. is this sample sufficient to conclude that the children with a history of preschool day care are significantly different from the general population? Use a two-tailed test with a=.o1
b. compute cohens d to measure the size of the preschool effect.
c. write a sentence showing how the outcome of the hypothesis test and measure of effect size would appear in a research report