The coefficient of determination r2 is the ratio of which two types of variations? What does r2 measure? What does 1 – r² measure? The coeffcient of determination is the ratio of the explained variation to the total variation. O B. The coefficient of determination is the ratio of the total variation to the explained variation. O A. The coefficient of determination is the ratio of the explained variation to the total variation. O C. The coefficient of determination is the ratio of the unexplained variation to O D. The coefficient of determination is the ratio of the total variation to the unexplained variation. the total variation. Choose the correct answer below. O A. The coefficient of determination is the percent of the predicted values that O B. The coefficient of determination is a measure of how closely two equal the actual data values. variables vary together. O C. The coefficient of determination is the percent of the variation that is unexplained. O D. The coefficient of determination is the percent of variation of y that is explained by the relationship between x and y.
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.



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