Tukey’s 1 DF Test of

Nonadditivity—SHR

Tukey’s 1 DF Test of

Nonadditivity—SHR^0.4

SS (Nonadditivity): 47.463

SS (Nonadditivity): 0.252

SS (Error): 211.477

SS (Error): 20.575

MS (Error): 0.722

MS (Error): 0.070

Significance Level: 0.050

Significance Level: 0.050

Test Statistic: 65.759

Test Statistic: 3.584

Critical Value: 3.873

Critical Value: 3.873

The test statistic is greater than the critical value, so there is significant evidence of interaction.

The test statistic is not greater than the critical value, so there is no significant evidence of interaction.