Use this information to answer questions 20-22 The Centers for Disease Control (CDC) reported on trends in weight, height and body mass index from the 1960’s through 2002. The general trend was that people were much heavier and slightly taller in 2002 as compared to 1960. In 2002, the mean weight for men was reported at 191 pounds. Suppose that an investigator hypothesizes that weights are even higher in 2006 (i.e., that the trend continued over the subsequent 4 years). In order to test the hypotheses, we select a random sample of males in 2006 and measure their weights. Suppose we have resources available to recruit n = 100 men into our sample. We weigh each participant and compute summary statistics on the sample data. Suppose in the sample we determine the mean to be 197.1 and standard deviation to be 25.6 20. What is the appropriate test statistic to use?................................................. 21. Write down the test statistic value. 22. Given that the table or the critical value is 1.64, do we accept or reject the claim that the mean weight is 191 and why?........................................................................... ............................................................
Use this information to answer questions 20-22 The Centers for Disease Control (CDC) reported on trends in weight, height and body mass index from the 1960’s through 2002. The general trend was that people were much heavier and slightly taller in 2002 as compared to 1960. In 2002, the
20. What is the appropriate test statistic to use?.................................................
21. Write down the test statistic value.
22. Given that the table or the critical value is 1.64, do we accept or reject the claim that the mean weight is 191 and why?........................................................................... ...............................................................................................
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