Posted by Jennifer on Sunday, October 16, 2011 at 11:17pm.
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??

Plz help me Sue!!  PsyDAG, Sunday, October 16, 2011 at 11:34pm
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.

statistics  PsyDAG, Sunday, October 16, 2011 at 11:35pm
Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.

Plz help me Sue!!  Jennifer, Sunday, October 16, 2011 at 11:43pm
81 = (x + 352)/5
81 = 352x/5
81 = 70.4x
x = 1.15??

Plz help me Sue!!  Jennifer, Sunday, October 16, 2011 at 11:50pm
Did i do that correctly??

Plz help me Sue!!  PsyDAG, Sunday, October 16, 2011 at 11:56pm
No, X+352 ≠ 352x
81 = (x + 352)/5
Multiply both sides by 5, then subtract 352 from both sides.

Plz help me Sue!!  Jennifer, Monday, October 17, 2011 at 12:14am
oh....so i get x = 53??
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