Find the mean of the step deviations: ClassFrequencyClassmarkdiui=dihinterval(fi)(xi)(xi−a)0−1004050−200−2100−20039150−100−1200−3003425000300−400303501001400−500454502002
A
0
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B
1188
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C
250
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D
250.52
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Solution
The correct option is B1188 ClassFrequencyClassmarkdiui=dihfiuiinterval(fi)(xi)(xi−a)0−1004050−200−2−80100−20039150−100−1−39200−30034250000300−40030350100130400−50045450200290Total1881i Mean of step deviations =∑fiui∑fi=1188