A study of reading comprehension in children compared three methods of instructi

Question

A study of reading comprehension in children compared three methods of instruction. The three methods of instruction are called Basal, DRTA, and Strategies. As is common in such studies, several pretest variables were measured before any instruction was given. One purpose of the pretest was to see if the three groups of children were similar in their comprehension skills. The READING data set described in the Data Appendix gives two pretest measures that were used in this study. Use one-way ANOVA to analyze these data and write a summary of your results.

Explanation / Answer

Let the null hypothesis be that the three goups of children are similar in their comprehension skills. Let the alternate hypothesisi be that the the three gops of chilren are not similar intheie comprehension skills. By puting values in excel an running the anova Anova: Single Factor SUMMARY Groups Count Sum Average Variance pre1 66 646 9.787879 9.123543 pre2 66 337 5.106061 4.89627 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 723.3409 1 723.3409 103.1884 3.33E-18 3.913989 Within Groups 911.2879 130 7.009907 Total 1634.629 131 From the above anova table we can see that the p value ontained is less than 5 % critical value therefore we do have enough evidence to reject null hypothesis. Therefore we conclude that comprehension skills of children are not similar.

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