1. a researcher would like to evaluate the effect of a new reading

1. A researcher would like to evaluate the effect of a new reading program for second-grade students.  Over the past five years, a standardized test given at the end of the second grade has produced a mean score of µ = 45.  A sample of n = 25 students is placed in the new program and, at the end of the school year they obtain a mean test score of M = 51 with SS = 9600.  Based on these data can the researcher conclude that the new program has a significant effect on reading scores?  Set the alpha at α = .05.

Note: Calculate Cohen’s d and r2 regardless of the decision.

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