Use this data and a significance level of 01 to test the

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Reference no: EM13619342

Consider the following summary data on the modulus of elasticity (×10^6 psi) for lumber of three different grades [in close agreement with values in the article "Bending Strength and Stffness of Second-Growth Douglas-Fir Dimension Lumber" (Forest Products J., 1991: 35-43), except that the sample sizes there were larger]:

Grade J xi si

1 10 1.63 .27

2 10 1.56 .24

3 10 1.42 .26

Use this data and a significance level of .01 to test the null hypothesis of no difference in mean modulus of elasticity for the three grades

Reference no: EM13619342

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