(3 points) For each problem, select the best response.
(a) Which of the following is least affected if an extreme high outlier is added to your data?
A. The mean.
B. The standard deviation.
C. The median.
D. None of the above.
(b) What percent of the observations in a distribution lie between the first quartile and the third quartile?
A. 75%.
B. 50%.
C. 25%.
D. None of the above.
(c) To make a boxplot of a distribution, you must know
A. the five-number summary.
B. the mean and the standard deviation.
C. all of the individual observations.
D. None of the above.