1. Match each curve with its correct label regarding birthweight differences (5, 10, or 15 oz). 2. What is the standardized effect size if the difference of interest is 10 oz below normal birthweight?
Suppose that you want to test the hypothesis that mothers with low socioeconomic status (SES) deliver babies whose birthweights are lower than “normal” at the 5% significance level. To test this hypothesis, you want to conduct a study in which you collect data from full-term live-born deliveries from various maternity wards of hospitals in low SES areas. It is assumed that the standard deviation of birthweights is 24 oz. A national survey has shown that “normal” birthweight is 120 oz.
You want to consider being able to detect differences of 5 oz, 10 oz, or 15 oz below normal birthweight. You decide to construct a power curve for each one of these differences where you look at power as a
1. Match each curve with its correct label regarding birthweight differences (5, 10, or 15 oz).
2. What is the standardized effect size if the difference of interest is 10 oz below normal birthweight?
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