A study of the properties of metal plate-connectedtrusses used for roof support (Modeling Joints Madewith Light-Gauge Metal Connector Plates, ForestProducts J., 1979: 3944) yielded the following observationson axial-stiffness index (kips/in.) for plate lengths4, 6, 8, 10, and 12 in: 4: 309.2 409.5 311.0 326.5 316.8 349.8 309.7 6: 402.1 347.2 361.0 404.5 331.0 348.9 381.7 8: 392.4 366.2 351.0 357.1 409.9 367.3 382.010: 346.7 452.9 461.4 433.1 410.6 384.2 362.612: 407.4 441.8 419.9 410.7 473.4 441.2 465.8Does variation in plate length have any effect ontrue average axial stiffness? State and test the relevanthypotheses using analysis of variance witha 5 .01. Display your results in an ANOVA table.[Hint: ooxij2 5 5,241,420.79.]

Thursday, January 5 th Kim Gilbert Kimgilb@uga.edu TA Office Hours, Boyd Room 204 • Monday 11:15 am – 5:30 pm • Friday 11:15 am – 3:30 pm Case Study: Helper vs. Hinderer • If infants have no preference, then the outcome can be mimicked by flipping a fair coin • Each coin represents one child; need to toss coin 16 times o Would expect 8 but doesn't need to be exactly 8 o Tail: helper; head: hinderer o How close to 8 does it