Mathematics
While computing the mean of grouped data, we assume that the frequencies are :
evenly distributed over all the classes
centred at the class marks of the classes
centred at the upper limits of the classes
centred at the lower limits of the classes
Related Questions
If 36 a + 36 b = 576, then the mean of a and b is :
6
8
12
16
If the mean of 7 observations is 43 and each observation is increased by 7, then what will be the new mean?
36
43
44
50
If the mean of five observations x, x + 2, x + 4, x + 6 and x + 8 is 11, then the mean of first three observations is :
9
11
13
none of these
The mean of five consecutive odd numbers A, B, C, D and E in ascending order is 37. What is the product of B and D?
1365
1585
1935
2035