1.
35, 30, 45, 40, 4

What will happen to the mean if the outlier, 4, is taken out of the data set above?
There is not enough information.
It will decrease.
It will increase.
It will stay the same.

Question

1.
35, 30, 45, 40, 4

What will happen to the mean if the outlier, 4, is taken out of the data set above?
There is not enough information.
It will decrease.
It will increase.
It will stay the same.

anonymous · Answer

Did you find the mean of both sets of numbers?

anonymous · Answer

First, you need to all of the numbers, including 4, together. Then divide by 5

anonymous · Answer

Then you add all of the numbers except 4.  Divide by 4

anonymous · Answer

The first problem will give you 30.8.  The second problem will give you 37.5.  So, the mean increases if 4 is taken out

anonymous · Answer

Does that make sense?