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Author Question: The data on grades (A, B, C, and D) scored by all students in a test is an example of a. ... (Read 67 times)

oliviahorn72

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on: Jun 24, 2018
The data on grades (A, B, C, and D) scored by all students in a test is an example of
 a. quantitative data.
  b. sample data.
  c. categorical data.
  d. analytical data.

Question 2

Among the results of a multiple regression analysis are the following sum-of-squares terms: SST, SSR, and SSE. What does each term represent, and how do the terms contribute to our understanding of the relationship between y and the set of independent variables.


cegalasso

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Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

SST is the total variation in the y values, SSR is the variation in the y values that is explained by the regression, and SSE is the variation in the y values that is not explained by the regression. The coefficient of multiple determination is equal to 1 - (SSE/SST), or SSR/SST. If SSE is small compared to SST, SSR will be large compared to SST, and the multiple regression equation will explain a large portion of the variation in y. Recall that SST = SSR + SSE.


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