The Healthy Eating Index measures on a 100-point scale the adequacy of consumption of vegetables, fruits, grains, milk, meat and beans, and liquid oils. This scale is called HEI2005 (Guenther et al.2007). There are two interviews for each person in the study. The first interview is identified by daycode = 1 and the second interview is identified by daycode = 2. This data is stored in the data file HEI Cost Data Variable Subset. Find a 95% confidence interval estimate of the difference in the mean HEI-2005 scores between male and female participants at the time of their first interview.
Answer to relevant QuestionsConsider again the data at the time of the first interview 1daycode = 12 for participants in the HEI-2005 study (Guenther et al. 2007). Find a 95% confidence interval estimate of the difference in the mean HEI-2005 scores ...Assuming equal population variances, determine the number of degrees of freedom for each of the following: a. nx = 16 s2x = 30 ny = 9 s2y = 36 b. nx = 12 s2x = 30 ny = 14 s2y = 36 c. nx = 20 s2x = 16 ny = 8 s2y = 25 Test the hypotheses H0: μ = 100 H1: μ < 100 using a random sample of n = 36, a probability of Type I error equal to 0.05, and the following sample statistics. a. x-bar = 106; s = 15 b. x-bar = 104; s = 10 c. x-bar = 95; s ...A company selling licenses for new e-commerce computer software advertises that firms using this software obtain, on average during the first year, a yield of 10% on their initial investments. A random sample of 10 of these ...In a random sample of 998 adults in the United States, 17.3% of the sample members indicated some measure of disagreement with this statement: Globalization is more than an economic trade system-instead it includes ...
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