A study of the properties of metal plate-connected trusses used for roof support yielded the following observations on axial stiffness index (kips/in.) for plate lengths 4, 6, 8, 10, and 12 in: 4:...

Extracted text: A study of the properties of metal plate-connected trusses used for roof support yielded the following observations on axial stiffness index (kips/in.) for plate lengths 4, 6, 8, 10, and 12 in: 4: 324.2 409.5 311.0 326.5 316.8 349.8 309.7 6: 444.1 347.2 361.0 404.5 331.0 348.9 381.7 8: 385.4 366.2 351.0 357.1 409.9 367.3 382.0 10: 357.7 452.9 461.4 433.1 410.6 384.2 362.6 12: 418.4 441.8 419.9 410.7 473.4 441.2 465.8 Does variation in plate length have any effect on true average axial stiffness? State the relevant hypotheses using analysis of variance. O Ho: H1 H2 # Hz# H4#Hs H: at least two u's are equal O Ho: H1 = H2 = H3 = H4 = H5 H: at least two u's are unequal H: all five u's are unequal SH = + = Et = Zy = :°H O O Ho: H1 H2 # H3 # H4 # 45 H: all five u's are equal Test the relevant hypotheses using analysis of variance with a = 0.01. Display results in an ANOVA table. (Round your answers to two decimal places.) Degrees of freedom Sum of Squares Mean Source Squares f Treatments Error Total


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