Exam MAS-I Practice Question 124
Study guide: Exam MAS-I
Five severity GLMs are each checked with a QQ plot of their deviance residuals. In every plot the sample quantiles are on the vertical axis, the theoretical quantiles on the horizontal axis, and a straight reference line is drawn. Match each description to the conclusion it supports. An option may be used more than once or not at all.
Part a (1 point)
The lowest points fall below the reference line, the highest points rise above it, and the middle follows the line.
- A) Residuals consistent with the assumed distribution
- B) Heavier tails than assumed at both ends
- C) Lighter tails than assumed at both ends
- D) Right tail heavier than assumed (more right-skewed)
- E) Left tail heavier than assumed (more left-skewed)
Part b (1 point)
The lowest points lie on the reference line; the highest points rise well above it.
- A) Residuals consistent with the assumed distribution
- B) Heavier tails than assumed at both ends
- C) Lighter tails than assumed at both ends
- D) Right tail heavier than assumed (more right-skewed)
- E) Left tail heavier than assumed (more left-skewed)
Part c (1 point)
The points follow the reference line closely from end to end, with small random wiggles.
- A) Residuals consistent with the assumed distribution
- B) Heavier tails than assumed at both ends
- C) Lighter tails than assumed at both ends
- D) Right tail heavier than assumed (more right-skewed)
- E) Left tail heavier than assumed (more left-skewed)
Part d (1 point)
The highest points lie on the reference line; the lowest points fall well below it.
- A) Residuals consistent with the assumed distribution
- B) Heavier tails than assumed at both ends
- C) Lighter tails than assumed at both ends
- D) Right tail heavier than assumed (more right-skewed)
- E) Left tail heavier than assumed (more left-skewed)
Part e (1 point)
The lowest points sit above the reference line, the highest points sit below it, and the middle follows the line.
- A) Residuals consistent with the assumed distribution
- B) Heavier tails than assumed at both ends
- C) Lighter tails than assumed at both ends
- D) Right tail heavier than assumed (more right-skewed)
- E) Left tail heavier than assumed (more left-skewed)
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