Please explain this. I understand that there needs to be an equal amount below a

Question

Please explain this. I understand that there needs to be an equal amount below and above the mean but its not making sense to me.

The (incomplete) histogram for a sample consisting of n 6 scores is shown on the following graph. The scores are represented as boxes sitting on a seesaw, but one of the scores is missing from the graph. When all six scores are sitting on the seesaw, it is balanced (rests level) when it pivots at a point equal to the sample mean X. Missing Data Value 1 23 4 56 78 Clear All

Explanation / Answer

let point is x

here from above as sample mean =5

therefore (x+1+6+7+7+8)/6 =5

x+29 =30

x=1

therefore we need to put box at x=1

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