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Question

Find the mean of the step deviations:
ClassFrequencyClass markdiui=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 B 1188
ClassFrequencyClass markdiui=dihfiuiinterval(fi)(xi)(xia)0100405020028010020039150100139200300342500003004003035010013040050045450200290Total1881i
Mean of step deviations =fiuifi=1188

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