In: Math
Design A Design B Design C
16 33 23
18 31 27
19 37 21
17 29 28
13 34 25
Use the Kruskal-Wallis H test and the Chi-Square table at the 0.05 level to compare the three designs.
Analysis:
The null hypothesis, ho: there is no significant difference in the median sales between Design A, B, and C.
An alternative hypothesis, h1: at least one of the median sales between design A, B and C differ significantly.
With chi-square (2) = 12.5, p<5%, I reject the null hypothesis and conclude that at least one of the median sales between design A, B and C differ significantly.
procedure to obtain output (SPSS)
analyse -> non parametric -> k independent samples