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LU LU Question 8 1 pts Dr. Roe finds a significant positive correlation between the number of cans of diet soda consumed per year and the number of days sick per year. From this correlation, you can confidently conclude that: Ingredients in diet soda cause illness. People crave diet soda when they are sick. People who drink more diet soda tend to be sick more often. Diet soda drinkers generally have a poorer diet. Question 9 1 pts Coefficient alpha measures: Test item difficulty The degree to which test items are consistent with each other Test stability over time The portion of a test score accounted for by guessing