Question

Mr. Rodriguez compared test scores with the amount of students over the past two years.Last YearThis YearninTest ScoresTest ScoresWhich summary statistics should be used to compare the two data sets and why?А.The median and the interquartile range because the data sets are normally distributed.B. The median and the interquartile range because the data sets are skewed.C.The mean and the standard deviation because the data sets are normally distributedD. The mean and the standard deviation because the data sets are skewed.

Answer 1

First we notice that the data is skewed, we know that in this situation it is better to use the median than the mean. Hence:

B. The median and the interquartile range because the data sets are skewed.