Turn in HW 1 Name __________________________________ Class Number _________________ 1. Suppose that we were determining the effects of smoking on heart disease. We found that amongst smokers in a certain age range, a proportion of .6634 with heart disease and amongst non-smokers we had a proportion of .1455 with heart disease. Determine AR and AR%. 2. Determine the standard deviation of the data set to 3 decimal places: 3 4 5 6.1 6.22 6.44 6.97 7 18 26.3 3. A new program was developed to hopefully reduce the risk of injury to college athletes. Several colleges were chosen to use the new program and compared to several colleges that did not use the program. The data is summarized in the table below. Determine the relative risk of injury for those not using the new program. Injured Not Injured Using Program 147 2226 Not Using 384 2482 4. Given a data set with a mean of 14.8x and a standard deviation of 1.6s , determine the z-score for the data value 11.3x . 5. Suppose that we collect 20 pieces of data and that our data set has a mean of 420 and a standard deviation of 12.8. Determine the coefficient of variation. Answers AR = _______________ AR% = ______________ Answer Answer Answer
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