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Suppose IQ scores were obtained for 20 randomly selected sets of twins. The 20 pairs of measurements yield x = 97.73, y = 99.55, r=
Suppose IQ scores were obtained for 20 randomly selected sets of twins. The 20 pairs of measurements yield x = 97.73, y = 99.55, r= 0.935, P-value = 0.000, and y = - 2.02 + 1.04x, where x represents the IQ score of the twin born first. Find the best predicted value of y given that the twin born first has an IQ of 95? Use a significance level of 0.05. Click the icon to view the critical values of the Pearson correlation coefficient r. The best predicted value of y is (Round to two decimal places as needed.)Assume that you have paired values consisting of heights (in inches) and weights (in lb) from 40 randomly selected men. The linear correlation coefficient ris 0.418. Find the value of the coefficient of determination. What practical information does the coefficient of determination provide? Choose the correct answer below. O A. The coefficient of determination is 0.825. 17.5% of the variation is explained by the linear correlation, and 82.5% is explained by other factors. O B. The coefficient of determination is 0.175. 17.5% of the variation is explained by the linear correlation, and 82.5% is explained by other factors. O C. The coefficient of determination is 0.825. 82.5% of the variation is explained by the linear correlation, and 17.5% is explained by other factors. O D. The coefficient of determination is 0.175. 82.5% of the variation is explained by the linear correlation, and 17.5% is explained by other factors.Using the lengths (in.), chest sizes (in.), and weights (1b) of bears from a data set, a researcher gets the regression equation below. Weight = - 274 +0.426 Length + 12.1 Chest Size Identify the response and predictor variables in this regression equation. Select the correct response. O A. The response variable is weight and the predictor variables are length and chest size. O B. The response variable is chest size and the predictor variables are weight and length. O C. The response variables are length and chest size and the predictor variable is weight. O D. The response variable is length and the predictor variables are weight and chest size
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