Increasing Plant Growth  A gardening company is testing new ways to improve plant growth. Twelve plants are randomly selected and exposed to a combination of two factors, a "Grow-light" in two different strengths and a plant food supplement with different are measured for growth, and the results (in inches) are put into appropriate boxes.                               Grow-light 1                     Grow-light 2 Plant food A            9.2, 9.4,8.9                       8.5, 9.2, 8.9 Plant food B             7.1, 7.2, 8.5                      5.5, 5.8, 7.6  Null Hypothesis Alternate Hypothesis Critical Values - Use Excel for calculations Anova Interaction  Summary

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