Answer:
YR = 33.6 in.
Step-by-step explanation:
△DLZ∼△MYR
LZ / DZ = YR / MR
21/18 = YR / 28.8
7 / 6 = YR / 28.8
YR = 7 * 28.8 / 6
YR = 33.6
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If I understand what you are asking, you can use the median as an average since it is not affected by the mean ( median is a measure of center). Since a mean is affected by outliers, it might lower the score if there are very low outliers. But note that if there are outliers way <em>greater </em>it can increase the average. You can use the Inter Quartile Range if shown on a box plot ( measure of variability).
I don't know what to do but I think it is #1
