Mathematics
The mean of given observations is :
| C.I. | f |
|---|---|
| 30-40 | 2 |
| 40-50 | 3 |
41
27
71
91
Statistics
18 Likes
Answer
| C.I. | f | Mean value (x) | fx |
|---|---|---|---|
| 30-40 | 2 | 35 | 70 |
| 40-50 | 3 | 45 | 135 |
| Total | Σf = 5 | Σfx = 205 |
By formula,
Mean = = 41.
Hence, Option 1 is the correct option.
Answered By
6 Likes
Related Questions
Find the arithmetic mean (correct to nearest whole number) by using step deviation method.
x f 5 20 10 43 15 75 20 67 25 72 30 45 35 39 40 9 45 8 50 6 Find the mean (correct to one place of decimal) by using short-cut method.
x f 40 14 41 28 43 38 45 50 46 40 49 20 50 10 For data given in the adjoining table, the mean is :
C.I. f x u = (x - A)/i f × u 0-10 5 10-20 10 20-30 10 17
27
25
60
The mean of observations, given in the adjoining table, is 24, the value of a is :
x f 10 10 20 a 30 30 20
30
10
25