Typical results show that a sample of n = 25 children who attended 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.The sample variance is (answer with a whole number, e.g. XX), the estimated standard error is (answer to two places to right of decimal e.g. X.XX), andt = (answer to two places to right of decimal e.g. X.XX).

For a two tailed test, the critical value is (answer to three places to right of decimal e.g. X.XXX).We should (accept OR reject)the null hypothesis and concludethat children with a history of day care (do OR do not)have significantly different cognitive skills.

b.Cohen's d = (answer to two places to right of decimal e.g. X.XX)