Hypothesis tests are proposed. For each hypothesis test. identify the variable.
ID: 3200330 • Letter: H
Question
Hypothesis tests are proposed. For each hypothesis test. identify the variable. identify the two populations. Self-Reported Weight. The article "Accuracy of Self-Reported Height and Weight in a Community-Based Sample of Older African Americans and Whites" (Journal of Gerontology Series A: Biological Sciences and Medical Sciences, Vol. 65A, No. 10, pp. 1123-1129) by G. Fillenbaum et al. explores the relationship between measured and self-reported height and weight. The authors sampled African American and White women and men older than 70 years of age. A hypothesis test is to be performed to decide Preliminary data analyses indicate that you can reasonably consider the assumptions for using pooled t-procedures satisfied in Exercises 10.45-10.50. For each exercise, perform the required hypothesis text by using either the critical-value approach or the P-value approach. In each of Exercises 10.69-10.72, suppose that you know that a variable is normally distributed on each of two populations. Further suppose that you want to perform a hypothesis test based on independent random samples to compare the two population means. For each exercise, decide whether you would use the pooled or nonpooled t-test, and give a reason for your answer. Recess and Wasted Food. E. Bergman et al. conducted a study to determine, among other things, the impact that scheduling recess before or after the lunch period has on wasted food for students in grades three through five. Results were published in the online article "The Relationship of Meal and Recess Schedules to Plate Waste in Elementary Schools" (Journal of Child Nutrition and Management. Vol, 28, Issue 2). Summary statistics for the amount of food wasted, in grams, by randomly selected students are presented in the following table. You know that the population standard deviations are not equal.
Explanation / Answer
1.112)
a)
Here, the variable is the either height or weight.
Since taken the values of either height or weight as a single measurement value for the two different populations
b)
The two different populations are African American and White men and women who are older than 70 years of age in the United States
Since we are interested in identify the relationship between the African American and white men and women based on either height or weight.
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