Mathematics · Statistics
Let X be the lower-class boundary of a class in a frequency distribution and z be the class mark (midpoint) of the class, then the upper-class boundary of the class would be:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1z - 2X
- 2z - z + X2
- 3X + z + X2
- 42z - X✓
Correct answer
2z - X
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