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Class Frequency 0-50 10 51-101 20 102-152 30 153-203 40 204-254 50 a) find the mean = show steps b) find the variance = show

Class Frequency

0-50 10

51-101 20

102-152 30

153-203 40

204-254 50

a) find the mean = show steps

b) find the variance = show steps

C0 find the standard deviation = show steps

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