DSC 423 Final Practice Quizzes

Page 1 of 13


DSC 423 Final Practice Quizzes



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Johns Hopkins University
School of Nursing
HIGH YIELDS QUESTIONS

NEWEST MODEL 2026 EXAM LATEST
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, Page 2 of 13




DSC 423 Final Practice Quizzes
The general form of a probabilistic model includes
Expected value, error, dependent variable
T/F: Regression is an example of unsupervised learning.
False
T/F: Experimental data should be used when evaluating the impact of
temperature and pressure on product defects.
True
T/F: Experimental data should be used when evaluating the impact of cocaine
on birth defects.
False
In a first-order model with a single independent variable, the slope of the
regression line is captured by:
B1
In a first-order model with a single independent variable, the y-intercept of the
regression list is captured by:
B0
T/F: The regression line is chosen because in minimizes the sum of the square
of the errors.
True
The regression line was chosen because....
It minimized the sum of the square of the errors (SSE).
Which of these are assumptions made by the least-squares reqression model
The mean of the probability distribution of the errors is 0.




The variability of the probability distribution of the errors is constant for all setting of
the independent variable.




The probability distribution of the errors is normal.