You are interested in the effectiveness of two different treatments in increasing thenumber of socially appropriate comments. You want to compare Treatment 1 andTreatment 2. You realize that the people enrolled in Treatment 1 and Treatment 2 havethe same average posttreatment scores (average = 5 socially appropriate commentsper session). Based on this histogram, what can you learn about the amount ofvariability in how effective these two treatments are?Frequency (# people)1098O0P12 34 5 6 7 8 9 10Number of socially appropriate commentsTreatment 1Treatment 2O Treatment 2 is more consistently effective across individuals (that is, a smaller SD).Treatment 1 is more consistently effective across individuals (that is, a smaller SD).Treatment 1 is more consistently effective across individuals (that is, a larger SD).Treatment 2 is more consistently effective across individuals (that is, a larger SD).

The efficacy of Treatments 1 and 2 is compared in this study. Increase the number of socially…

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