Conduct a test of the overall model for the prediction of the cereal healthiness rating. What is the null and alternative hypothesis for the test? What is the value of the test statistic for the overall regression model? What is your decision and conclusion for the test?
Ho: β1 = β2 . . . = βk = 0
Ha: : at least one β ≠ 0
The F test statistic for the overall model is 39.379 with a p-value of .000
Decision: The p-value < α, reject Ho. There is enough evidence at the 5% level of significance to conclude that the model is a significant predictor of the healthiness rating of breakfast cereals. At least one of the explanatory variables is a significant linear predictor.
Tests of the individual slope coefficients are conducted to determine which explanatory variables significantly impact healthiness ratings.
Decision: Since p-value < α, reject Ho. There is enough evidence at the 5% level of significance to conclude that the number of fat grams is a significant linear predictor of the healthiness rating of breakfast cereals.