Data set A: 10, 15, 20
Data set B: 10, 15, 20, 5
The lists give the values in data sets A and B. Which statement correctly compares the mean of data set A and the mean of data set B?
The mean of data set A is greater than the mean of data set B.
The mean of data set A is less than the mean of data set B.
The means of data set A and data set B are equal.
There is not enough information to compare the means.
