Calculate the mean, standard deviation and variance for the following frequency distribution. 40-50 X 10-20 20-30 30-40 50-60 60-70 70-80 80-90 90-100 35 165 215 185 145 105 75 65 45

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Calculate the mean, standard deviation and variance for the following frequency distribution.
40-50
10-20
20-30
30-40
50-60
60-70
70-80
80-90
90-100
F
35
165
215
185
145
105
75
65
45
Transcribed Image Text:Calculate the mean, standard deviation and variance for the following frequency distribution. 40-50 10-20 20-30 30-40 50-60 60-70 70-80 80-90 90-100 F 35 165 215 185 145 105 75 65 45
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