Relevant Competitive Tests:
For a symmetrical distribution approximately 68% of the cases are included between _________________?
A. X¯¯¯¯−S and X¯¯¯¯+SCorrect Answer
B. X¯¯¯¯−2S and X¯¯¯¯+2S
C. X¯¯¯¯−3S and X¯¯¯¯+3S
D. None of these
Correct Option: A. X¯¯¯¯−S and X¯¯¯¯+S
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