Q. Select the outlier in the data set. 4,84,86,87,89,90,91,93,94
Identify Outlier: Identify the data set and look for any number that appears to be significantly different from the rest of the numbers in the set.Data set: 4,84,86,87,89,90,91,93,94Looking at the data set, we can see that the number 4 is much smaller than all the other numbers, which are all in the 80s and 90s.
Confirm Outlier: To confirm that 4 is an outlier, we can calculate the mean and standard deviation of the data set and then determine if 4 is more than 1.5 or 2 standard deviations away from the mean. However, in this case, since 4 is so far from the rest of the numbers, it is clear without calculation that it is an outlier.