- X¯¯¯¯−3SX¯−3S and X¯¯¯¯+3S
- X¯¯¯¯−2SX¯−2S and X¯¯¯¯+2S
- X¯¯¯¯−SX¯−S and X¯¯¯¯+S
- None of these

**Right Answer:**X¯¯¯¯−SX¯−S and X¯¯¯¯+S

January 4, 2018 Asghar Khan Statistic

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