Solutions Statistics

Solution) Based on the following table, which groups are significantly different from each other using the Bon

Question: Based on the following table, which groups are significantly different from each other using the Bonferroni test and a significance level of 0.05?

Dependent Variable: STRENGTH

Bonferroni

(I) Content (J) Content Mean Difference Std. Error Sig. 95% Confidence Interval ________________ Lower Upper Bound Bound
5 % Hardwood 10% hardwood 15% hardwood 20% hardwood -4.00 -5.33 -9.50* 1.886 1.886 1.886 .280 .062 .000 -9.52 -10.85 -15.02 1.52 .19 -3.98
10% Hardwood 5% hardwood 15% hardwood 20% hardwood 4.00 -1.33 -5.50 1.886 1.886 1.886 .280 1.000 .051 -1.52 -6.85 -11.02 9.52 4.19 2.16E-02
15% Hardwood 5% hardwood 10% hardwood 20% hardwood 5.33 1.33 -4.17 1.886 1.886 1.886 .062 1.000 .234 -.19 -4.19 -9.69 10.85 6.85 1.35
20% Hardwood 5% hardwood 10% hardwood 15% hardwood 9.50 * 5.50 4.17 1.886 1.886 1.886 .000 .051 .234 3.98 -2.16E-02 -1.35 15.02 11.02 9.69

? The mean difference is significant at the .05 level.

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Answer: The solution file consists of 2 pages
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