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Find the mean deviation from the mean for the data:
| Classes | 95-105 | 105-115 | 115-125 | 125-135 | 135-145 | 145-155 |
| Frequencies | 9 | 13 | 16 | 26 | 30 | 12 |
Concept: undefined >> undefined
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
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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
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
