Question12

True/False: The snowflake schema differs from the star schema in that the table holding the dimensional data are normalized.

Select one:

True

False

Question 13

Which of the following statements will generate a multiple linear regression model within R where the output or predicted variables is Sales and the prediction variables include temperature and unemploymentrate?

Select one:

a. lm(sales~temperature+unemploymentrate)

b. lm(temperature+unemploymentrate=sales)

c. lm(sales+temperature~unemploymentrate)

d. None of these commands are valid

Question 14

True/False: A regression model has a R² statistic of .15. This indicates that the regression model is NOT a good fit and does a poor job of predicting the outcome based upon the input variables.

Select one:

True

False

Question 15

True/False: Data Mining can be said to be a process designed to detect patterns in data sets.

Select one:

True

False