An article in the journal applied nutritional investigation reported the results of a comparison between a low-calorie soy-protein diet and a low-calorie traditional-protein diet (liao, 2007). twelve obese participants were randomly assigned to each diet. at the end of the diet period, those on the soy diet lost an average of 2.3% of their body fat (sd = 0.55), while those on the traditional diet lost an average of 1.22% of their body fat (sd = 0.50). if we increase the sample size of this study, the value of the test statistic would but the effect size would
increase, remain the same
decrease, remain the same
decrease, increase
increase, decrease