Which of the following statements about shapes of histograms is true?
a. A histogram is said to be symmetric if, when we draw a vertical line down the center of the histogram, the two sides are identical in shape and size.
b. A negatively skewed histogram is one with a long tail extending to the left.
c. A positively skewed histogram is one with a long tail extending to the right.
d. All of these choices are true.
Question 2
A nonparametric test would be used if _____.
a. nominal data are available
b. interval data are available
c. it is known that the population is normally distributed
d. None of the answers is correct.
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