Exam 1

Question
In the following figure the distributions of a variable
given by two samples (A and B) are represented by parallel boxplots.
Which of the following statements are correct? (Comment: The
statements are either about correct or clearly wrong.)

The location of both distributions is about the same.

Both distributions contain no outliers.

The spread in sample A is clearly bigger than in B.

The skewness of both samples is similar.

Distribution A is rightskewed.
Solution

False. Distribution B has on average higher values than distribution A.

False. There are observations which deviate more than 1.5 times the interquartile range from the median.

True. The interquartile range in sample A is clearly bigger than in B.

True. The skewness of both distributions is similar, both are about symmetric.

False. Distribution A is about symmetric.