Q1. A distribution that is skewed with a tail to the left is which of the following?
A.Positively skewed
B. Symmetric
C. Negatively skewed
D. Normal
Correct Answer: C
Q2. In positively skewed distributions, the mean is usually which of the following?
A.Larger than the median
B. Between the median and the mode
C. Smaller than the median
D. Equal to the median
Correct Answer: A
Q3. Which of the following is characteristic of a normal distribution?
A.It represents a perfect distribution of data
B. It generally is skewed with a tail to the right
C. It is best used to force a desired outcome.
D. It approximates the distribution of naturally occurring phenomena.
Correct Answer: D
Q4. What type of regression model does the following equation suggest? y = a + b1x1
A.Multiple factor regression
B. Nonlinear regression
C. Bivariate regression
D. Curvilinear regression
Correct Answer: C
Q5. What type of relationship does the following equation model? y = a + b1x1 + b2x2
A.Nonlinear regression
B. Straight line regression
C. Multiple linear regression
D. All of the above
Correct Answer: C
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