The U.S. Department of Agriculture (USDA) Center for Nutrition Policy and Promotion (CNPP) uses the Healthy Eating Index to monitor the diet quality of the U.S. population, particularly how well it conforms to dietary guidance. The HEI-2005 measures how well the population follows the recommendations of the 2005 Dietary Guidelines for Americans (Guenther et al. 2007). Data collected on a random sample of individuals who participated in two extended interviews and medical examinations are contained in the data file HEI Cost Data Variable Subset, where the first interview is identified by daycode = 1 and data for the second interview are identified by daycode = 2. One variable in the HEI-2005 study is a participant's activity level, coded as 1 = sedentary, 2 = active, and 3 = very active. In Chapter 1, we constructed bar charts of participants' activity level by gender for data collected on the first interview. Determine if there is an association between activity level and gender.
Answer to relevant QuestionsUniversity administrators have collected the following information concerning student grade point average and the school of the student’s major. Determine if there is any association between GPA and major. A random sample of 12 financial analysts was asked to predict the percentage increases in the prices of two common stocks over the next year. The results obtained are shown in the table. Use the sign test to test the null ...A random sample of 10 students was asked to rate, in a blind taste test, the quality of two brands of ice cream, one reduced-sugar and one regular ice cream. Ratings were based on a scale of 1 (poor) to 10 (excellent). The ...For a random sample of 12 business graduates from a technical college, the starting salaries accepted for employment on graduation (in thousands of dollars) were the following: For an independent random sample of 10 ...A time series contains 16 observations. What is the probability that the number of runs a. Is at most 5? b. Exceeds 12?
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