The width of each bar in a histogram corresponds to the:
A) midpoint of the class.
B) number of observations in the class.
C) boundaries of the class.
D) percentage of observations in the class.
Question 2
Which of the following statements involve descriptive statistics as opposed to inferential statistics?
A) The Alcohol, Tobacco and Firearms Department reported that Seattle had 1,825 registered gun dealers in 2013.
B) Based on a survey of 380 magazine readers, the magazine reports that 30 of its readers prefer double column articles.
C) The FAA samples 425 traffic controllers in order to estimate the percent retiring due to job stress related illness.
D) Based on a sample of 350 professional baseball players, a baseball magazine reported that 23 of the parents of all professional baseball players did not play baseball.
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