Bida 630 Data Analytics Final Study Guide Graded A+

In JMP a diamond is displayed in the box, where the center of the diamond is _________. {Ans: The mean}True or false: Clustering is a supervised learning method {Ans: False}True or false: Pairs of variables that have a very strong (positive or negative) correlation contain duplicative information. Therefore, we want to omit the variables that are strongly correlated to others to avoid multicolinearity (when fitting models). {Ans: True}True or False: The classification matrix, also called confusion matrix, gives estimates of the true classification and misclassification rates. {Ans: True}True or false: k-NN algorithm can only be used for classification (of categorical outcome) {Ans: False}The density ellipsoid in scatterplot matrix is a good graphical indicator of the correlation between two variables. The ellipsoid collapses diagonally as the correlation between the two variables approaches either 1 or -1. The ellipsoid is more circular if the two variables are more correlated. (TRUE or FALSE?) {Ans: False; The ellipsoid is more circular (less diagonally oriented) if the two variables are less correlated}