Asked by Jennifer

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 81, the median is 91, and the mode is 91.

How do i do this??
Answered by PsyDAG
If the mode (most frequently occurring score) = 91, at least 2 of the scores = 91. You only need to find one more score. Use the mean.

81 = (x+70+91+91+100)/5

Solve for x.

To check, it should still lead to a median of 91.


Answered by PsyDAG
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Answered by Jennifer
81 = (x + 352)/5
81 = 352x/5
81 = 70.4x
x = 1.15??
Answered by Jennifer
Did i do that correctly??
Answered by PsyDAG
No, X+352 ≠ 352x

81 = (x + 352)/5

Multiply both sides by 5, then subtract 352 from both sides.

Answered by Jennifer
oh....so i get x = 53??
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