To answer this it’s best to order the data:
$37,000, $40,000, $42,000, $45,000, $45,000, $46,000, $48,000, $48,000, $52,000, $90,000
Median is $45,500 (central value) and mean (average) is $49,300.
The median is lower than the mean.
If the lowest salary is removed, the median is $46,000 and the mean is $50,666.67, and the median is still lower than the mean.
If the highest salary is removed, the median is $45,000 and the mean is $44,777.78, and the median is higher than the mean.
The highest salary causes the mean to be higher than the median, answer D. This shows that the higher outlier has a greater effect on the mean than the lower outlier.