5. [-143 Points] DETAILS DEVORESTAT9 10.1.008.5. MY 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 4: 345.2 409.5 311.0 326.5 316.8 349.8 309.7 6: 403.1 347,2 361.0 404.5 331.0 348.9 381.7 8: 391.4 366.2 351.0 357.1 409.9 367.3 382.0 10: 354.7 452.9 461.4 4331 410.6 384.2 362.6 12: 411.4 441.8 419.9 410.7 473.4 441.2 465.8 USE SALT Does variation in plate length have any effect on true average axial stiffness? State the relevant hypotheses using analysis of variance. Hall five /s are unequal OHH HH HHS Ha all five us are equal Ha at least two 's are unequal) OH H H H Has H: at least two 's are equal) Test the relevant hypotheses using analysis of variance with a 0.01. Display your results in an ANOVA table. (Round your answers to two decimal places.) Degrees of Sum of freedom Squares Squares Source Treatments Mean Error Total Give the test statistic. (Round your answer to two decimal places.)