An article describes an experiment in which several types of boxes were compared with respect to compression strength (Ib). The table below presents the results of a single-factor ANOVA experiment...

R3

Extracted text: An article describes an experiment in which several types of boxes were compared with respect to compression strength (Ib). The table below presents the results of a single-factor ANOVA experiment involving I = 4 types of boxes. Type of Box Compression Strength (Ib) Sample Mean Sample SD 655.5 788.3 734.3 721.4 679.1 699.4 713.00 46.55 2 789.2 772.5 786.9 686.1 732.1 774.8 756.93 40.34 3 737.1 639.0 696.3 671.7 717.2 727.1 698.07 37.20 4 535.1 628.7 542.4 559.0 586.9 520.0 562.02 39.87 Suppose that the compression strength observations on the fourth type of box had been 646.1, 739.7, 653.4, 670.0, 697.9, and 631.0 (obtained by adding 111 to each previous X4;). Assuming no change in the remaining observations, carry out an F test with a = 0.05. State the appropriate hypotheses. O Họ: H1 + u2 * 43 # 44 Hạ: all four u's are equal O Ho: u1 = uz = u3 = u4 Ha: at least two u's are unegual O Ho: H1 # u2 # 43 # 44 Hạ: at least two u's are equal O Ho: H1 = u2 = u3 = M4 H3: all four u's are unequal Calculate the test statistic. (Round your answer to two decimal places.) f = 4.19


Extracted text: 4.20 is still wrong