Different methods of teaching reading. In the READING data set, described in the Data Appendix, the response variable Post3 is to be compared for three methods of teaching reading.

The Basal method is the standard, or control, method, and the two new methods are DRTA and Strat. We can use the methods of this chapter to compare Basal with DRTA and Basal with Strat. Note that to make comparisons among three treatments it is more appropriate to use the procedures that we will learn in Chapter 12.

(a) Is the mean reading score with the DRTA method higher than that for the Basal method?

Perform an analysis to answer this question, and summarize your results.

(b) Answer part

(a) for the Strat method in place of DRTA.