BIDA 630 Data Analytics Final Exam Study Guide with Complete Solutions
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Course
BIDA 630
Institution
BIDA 630
BIDA 630 Data Analytics Final Exam
Study Guide with Complete Solutions
Identify whether the task required is supervised or unsupervised learning: Predicting
whether a company will go bankrupt based on comparing its financial data to those of
similar bankrupt and nonbankrupt firms. - Answer-Supe...
Scatter plots play important role in prediction. Next step can be developing a model.
Scatter plots provide information about relationships (linear or non-linear) between
variables. The variables in scatter plot ________. - Answer✔✔-Numerical
In a box plot, the box include %50 of the data, the horizontal line represents
(i)____________, the top and bottom of the box represent (ii)________, respectively. -
Answer✔✔-(i) the Median (50th percentile); (ii) the 75th and 25th percentiles
In JMP a diamond is displayed in the box, where the center of the diamond is
_________. - Answer✔✔-The mean
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?) - Answer✔✔-False; The ellipsoid is more circular (less diagonally oriented)
if the two variables are less correlated
True or False: Sensitivity and Specificity are plotted on an ROC Curve. - Answer✔✔-
True
To obtain an honest estimate of future classification error, we use the classification
matrix that is computed from ________. - Answer✔✔-Validation data
True or False: The classification matrix, also called confusion matrix, gives estimates of
the true classification and misclassification rates. - Answer✔✔-True
2/8
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