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4. [ODSIDJT Pains] [ DETAILS [ PREVIOUS ANSWERS BBUNDERSTAT'IZ 7.4.0145. MY NOT Independent random samples of professional football and basketball players gave the following infon'nation. Assume that the weight distributions are moundshaped and symmetric. Weights (in lb) of pro football players: x1; :11 = 21 248 261 255 251 244 276 240 265 25? 252 282 256 250 264 270 275 245 225 253 265 222 Weights (in lb) of pro basketball players: x2; :12 = 19 205 200 220 210 191 215 221 216 228 207 22.5 208 195 191 207Ir 196 181 193 201 IE use SALT (a) Use a calculator with mean and standard deviation keys to calculate E1, 51, 1'2, and 52. {Round your answers to four decimal places.) f|:|x i==x =_x (b) Let _a.i1 be the population mean for Jr1 and let :12 be the population mean for x2. Find a 99% condence interval for _u.i -\"2- (Round your answers to one decimal place.) lowerlirm't x upperm'rt x \"NIB H>