Question 33

When reducing the number of dimensions of data using principle components analysis, the result is the loss of some information.

Select one:

True

False

Question 34

Assume that you are the data scientist for the online auction site superbids.com. To increase bidding activity, you want to display items to a user that people with similar characteristics and buying patterns have bid on. Which technique are you most likely to use?

Select one:

a. Linear Regression

b. K-nearest neighbors classification

c. Bayes Classifier

d. Hierarchical clustering

Question 35

The schema design employed in a data warehouse that consists of a fact table surrounded by un-normalized dimensional tables is called the: _____

Question 36

Question 37

A linear regression model is expressed as y = ax+b (in the text the form was given as Y ~ 0+ where 0 is the equivalent of b and is the intercept and 1 is the equivalent of a and is the slope of the line). The following equations can be used to compute the value of the coefficients a and b. Question 36 Ca 2 1-1 1-1 r7 1-1 Using the following set of data, find the coefficients a and b rounded to the nearest thousandths place and the predicted value of y when x is 10. when x is 10