NFL football enthusiasts often look at a team€™s total points scored for (Pts F) and total points scored against (Pts A) as a way of comparing the relative strength of teams. The season totals for the 32 teams in the NFL€™s 2009 season are shown below:

a. Calculate the linear correlation coefficient (Pearson€™s product moment, r) for the points scored for and against.
b. What conclusion can you draw from the answer in part a?
c. Construct the scatter diagram and comment on how it supports, or disagrees with, your comments in part b.

Transcribed Image Text:

Pts F Pts A I Pts F Pts A I Pts F Pts A Pts F Pts A 427 285 305 291 416 307 454 320 48 236 3 261 388 333 326 324 360 390 368 324 354 402 197 379 258 326 245 375 290 380 294 424 361 250 470 312 510 341 375 325 429 337 461 297363 325 330 281 402 427 327 375 315 308 280 390 266 336 262 494 244 400 175 436