PSYC 210 EXAM VERIFIED TEST PAPER
QUESTIONS AND SOLUTIONS
◉ The preferred way to display the frequency of variables measured
on an interval scale is a:
A. Histogram
B. Cumulative frequency polygon
C. Pie chart
D. Relative frequency polygon.
Answer: A. Histogram
explanation:
never discussed polygons (not an option)
pie charts can be a method but it's not the best because frequencies
can be vary close in comparison so it doesn't clearly display the
details
◉ Which of the following is true of interval variables?
A. They have a true zero point
B. They assume equal intervals between numbers
C. Dividing numbers gives meaningful results
, D. The numbers have no meaning (i.e., they are placeholders).
Answer: B. They assume equal intervals between numbers
◉ What type of skew does this frequency distribution exhibit?.
Answer: negative
◉ When would the median be the most effective way to describe a
distribution?
A. When the data are normally distributed
B. The median is never appropriate
C. When the data are nominal
D. When the mean is skewed by outliers.
Answer: D. When the mean is skewed by outliers
◉ Why do we prefer to use standard deviation (SD) over variance
when we have interval or ratio data?
A. SD is simpler to calculate
B. Variance is in raw units, making it more interpretable
C. We do not prefer SD to variance
D. SD is in raw units, making it more interpretable.
Answer: D. SD is in raw units, making it more interpretable
QUESTIONS AND SOLUTIONS
◉ The preferred way to display the frequency of variables measured
on an interval scale is a:
A. Histogram
B. Cumulative frequency polygon
C. Pie chart
D. Relative frequency polygon.
Answer: A. Histogram
explanation:
never discussed polygons (not an option)
pie charts can be a method but it's not the best because frequencies
can be vary close in comparison so it doesn't clearly display the
details
◉ Which of the following is true of interval variables?
A. They have a true zero point
B. They assume equal intervals between numbers
C. Dividing numbers gives meaningful results
, D. The numbers have no meaning (i.e., they are placeholders).
Answer: B. They assume equal intervals between numbers
◉ What type of skew does this frequency distribution exhibit?.
Answer: negative
◉ When would the median be the most effective way to describe a
distribution?
A. When the data are normally distributed
B. The median is never appropriate
C. When the data are nominal
D. When the mean is skewed by outliers.
Answer: D. When the mean is skewed by outliers
◉ Why do we prefer to use standard deviation (SD) over variance
when we have interval or ratio data?
A. SD is simpler to calculate
B. Variance is in raw units, making it more interpretable
C. We do not prefer SD to variance
D. SD is in raw units, making it more interpretable.
Answer: D. SD is in raw units, making it more interpretable
