1.

The outcome of each of 30 items was observed ; 10 items gave an outcome 12−d each, 10 items gave outcome 12 each and the remaining 10 items gave outcome 12+d each. If the variance of this outcome data is 43, then |d| equals to

Answer»

The outcome of each of 30 items was observed ; 10 items gave an outcome 12d each, 10 items gave outcome 12 each and the remaining 10 items gave outcome 12+d each. If the variance of this outcome data is 43, then |d| equals to



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