The tensile strengths (in psi) of three types of wires are under study. Suppose that following table represents the data for the three types of wires (after subtracting from the specified target value) tested.
TYPE I: 11, 12, 12, 13, 10
TYPE II: 13, 14, 15, 15, 17
TYPE III: 14, 13, 15, 13, 11
(a) Perform an analysis of variance for the above experiment and FILL IN THE FOLLOWING ANOVA table.
SOURCE DF SS MS F p-value
(b) Do the data provide sufficient evidence to indicate at 5% level that the average tensile strengths for the three types of wires are the same? First set up null and alternative hypotheses.
This posting contains solution to following ANOVA problem.