To compare the means of data sets X and Y, we need to calculate the mean for each data set.
Data set X:
Values: 5, 9, 9, 13
Mean (X) = (5 + 9 + 9 + 13) / 4
Mean (X) = 36 / 4
Mean (X) = 9
Data set Y:
Values: 5, 9, 9, 13, 27
Mean (Y) = (5 + 9 + 9 + 13 + 27) / 5
Mean (Y) = 63 / 5
Mean (Y) = 12.6
Now we can compare the two means:
- Mean (X) = 9
- Mean (Y) = 12.6
Since 9 < 12.6, we find that:
B) The mean of data set X is less than the mean of data set Y.