If the confidence interval for the difference between two treatment means does not include zero, we can conclude that the means are statistically significantly different, and can also conclude which mean is larger and which one is smaller.

Choose the correct interpretation for the coefficient of the Wine_Consumption_per_capita explanatory variable: Fill in the blanks: An increase in wine consumption per capita by one unit results in a(n) ___________ in cirrhosis death rate of ___________ , holding all other variables constant.

In simple linear regression, we test the null hypothesis that

What is the value of B, the adjusted R-squared?

When transforming a categorical variable into dummy variables, the dummy variables are distributed uniformly between 0 and 1 across the range of N, where N is the sum of all sample sizes across the k samples.

In linear regression, the coefficient of determination, , is between 0 and 1 and increases when the sum of squared errors (SSE) decreases. 

In ANOVA, the mean sum of squared treatments (MSSTr) is a measure of the within-group variation. 

In linear regression, the predicting variables and the response variable are all random variables.

In ANOVA, the greater the value of the F ratio (MSTr/MSE), 

Part 2 – Multiple Choice