17) The cholesterol levels (in milligrams per deciliter) of 30 adults are listed below. Draw a 17) box-and - whisker plot that represents the data, then tell the interquartile range. 154 156 165 165 170 171 172 180 184 185 189 189 190 192 195 198 198 200 200 200 205 205 211 215 220 220 225 238 255 265 18) The data below are the average monthly temperatures, in "F, and the monthly natural gas 18) consumption, in ccf, for a household in northwestern Pennsylvania. Calculate the correlation coefficient, r, and describe the relationship. Temperature | 47 35 21 27 39 48 61 65 70 Consumption 34 169 248 134 137 100 19 34 12 19) "Bonus* Use the regression equation to predict the value of y for x = -2.8. Assume that the 19) variables x and y have a significant correlation. 1-5-3 4 1 -1 -2 0 2 3 -4 y - 10 - 8 9 1 - 2 - 6 -1 3 6 - 8