The systolic blood pressure of individuals is thought to be related to both age and weight. For a random sample of 11 men, the following data were obtained. Systolic Blood pressue x1 Age (years) x2 Weight (pounds) x3 132 52 173 143 59 184 153 67 194 162 73 211 154 64 196 168 74 220 137 54 188 149 61 188 159 65 207 128 46 167 166 72 217           a) Use level of significance 5%. (Use 2 decimal places for t and 3 decimal places for the P-value.)   t P value ?2     ?3       b) Find a 90% confidence interval for each coefficient. (Use 2 decimal places.)   lower limit upper limit ?2     ?3       c) Suppose Michael is 68 years old and weighs 192 pounds. Predict his systolic blood pressure, and find a 90% confidence range for your prediction. (Use 1 decimal place.) prediction   lower limit   upper limit

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