A researcher conducts an experiment comparing two methods of teaching young children to read. An older method is compared with a newer one, and the mean performance of the new method was found to be greater than that of the older method. The results are reported as t (120) = 2.10, p = .04 (d = .34).

A. Is the result statistically significant?

B. How many participants were in this study?

C. Based on the effect size measure, d, what may we say about the size of the effect found in this study?

D. The researcher states that on the basis of this result the newer method is clearly of practical significance when teaching children to read and should be implemented right away. How would you respond to this statement?

E. What would the construction of confidence intervals add to our understanding of these results?