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Find the mean deviation from the mean for the data:
| Classes | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 |
| Frequencies | 6 | 8 | 14 | 16 | 4 | 2 |
Concept: undefined >> undefined
Compute mean deviation from mean of the following distribution:
| Mark | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 |
| No. of students | 8 | 10 | 15 | 25 | 20 | 18 | 9 | 5 |
Concept: undefined >> undefined
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The age distribution of 100 life-insurance policy holders is as follows:
| Age (on nearest birth day) | 17-19.5 | 20-25.5 | 26-35.5 | 36-40.5 | 41-50.5 | 51-55.5 | 56-60.5 | 61-70.5 |
| No. of persons | 5 | 16 | 12 | 26 | 14 | 12 | 6 | 5 |
Calculate the mean deviation from the median age
Concept: undefined >> undefined
Find the mean deviation from the mean and from median of the following distribution:
| Marks | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
| No. of students | 5 | 8 | 15 | 16 | 6 |
Concept: undefined >> undefined
Calculate mean deviation about median age for the age distribution of 100 persons given below:
| Age: | 16-20 | 21-25 | 26-30 | 31-35 | 36-40 | 41-45 | 46-50 | 51-55 |
| Number of persons | 5 | 6 | 12 | 14 | 26 | 12 | 16 | 9 |
Concept: undefined >> undefined
Calculate the mean deviation about the mean for the following frequency distribution:
| Class interval: | 0–4 | 4–8 | 8–12 | 12–16 | 16–20 |
| Frequency | 4 | 6 | 8 | 5 | 2 |
Concept: undefined >> undefined
Calculate mean deviation from the median of the following data:
| Class interval: | 0–6 | 6–12 | 12–18 | 18–24 | 24–30 |
| Frequency | 4 | 5 | 3 | 6 | 2 |
Concept: undefined >> undefined
The mean of 5 observations is 4.4 and their variance is 8.24. If three of the observations are 1, 2 and 6, find the other two observations.
Concept: undefined >> undefined
For a frequency distribution mean deviation from mean is computed by
Concept: undefined >> undefined
The mean deviation from the median is
Concept: undefined >> undefined
The mean deviation of the series a, a + d, a + 2d, ..., a + 2n from its mean is
Concept: undefined >> undefined
A batsman scores runs in 10 innings as 38, 70, 48, 34, 42, 55, 63, 46, 54 and 44. The mean deviation about mean is
Concept: undefined >> undefined
The mean deviation of the numbers 3, 4, 5, 6, 7 from the mean is
Concept: undefined >> undefined
The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 from the mean is
Concept: undefined >> undefined
The mean deviation for n observations \[x_1 , x_2 , . . . , x_n\] from their mean \[\bar{X} \] is given by
Concept: undefined >> undefined
Let \[x_1 , x_2 , . . . , x_n\] be n observations and \[X\] be their arithmetic mean. The standard deviation is given by
Concept: undefined >> undefined
If second, third and sixth terms of an A.P. are consecutive terms of a G.P., write the common ratio of the G.P.
Concept: undefined >> undefined
Write the quadratic equation the arithmetic and geometric means of whose roots are Aand G respectively.
Concept: undefined >> undefined
If a, b, c are in A.P. and x, y, z are in G.P., then the value of xb − c yc − a za − b is
Concept: undefined >> undefined
The first three of four given numbers are in G.P. and their last three are in A.P. with common difference 6. If first and fourth numbers are equal, then the first number is
Concept: undefined >> undefined
