Calculate the mean of the following data
Class intervel
1-3
3-5
5-7
Frequency
18
9
3​

1 thought on “Calculate the mean of the following data<br />Class intervel<br />1-3<br />3-5<br />5-7<br />Frequency<br />18<br />9<br />3​”

1. Answer:

   I think it’s mean is 4.2 because sum of observation is 20 and no.of observation is 7

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