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Which average is affected most by the presence of extreme items?
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The algebraic sum of deviation of a set of n values from A.M. is ______
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The arithmetic mean is a positional value.
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If the arithmetic mean of the data given below is 28, find the missing frequency?
|
Profit per retail shop (in Rs) |
0 - 10 |
10 - 20 |
20 - 30 |
30 - 40 |
40 - 50 |
50 - 60 |
|
Number of retail shops |
12 |
18 |
27 |
- |
17 |
6 |
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The following information pertains to the daily income of 150 families. Calculate the arithmetic mean.
|
Income (in Rs) |
Number of families |
|
More than 75 |
150 |
|
More than 85 |
140 |
|
More than 95 |
115 |
|
More than 105 |
95 |
|
More than 115 |
70 |
|
More than 125 |
60 |
|
More than 135 |
40 |
|
More than 145 |
25 |
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The following table gives the daily income of ten workers in a factory. Find the arithmetic mean.
|
Workers |
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
|
Daily Income (in Rs) |
120 |
150 |
180 |
200 |
250 |
300 |
220 |
350 |
370 |
260 |
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The following table gives production yield in kg. per hectare of wheat of 150 farms in a village. Calculate the mean values.
| Production yield (kg. per hectare) | 50 - 53 | 53 - 56 | 56 - 59 | 59 - 62 | 62 - 65 | 65 - 68 | 68 - 71 | 71 - 74 | 74 - 77 |
| Number of farms | 3 | 8 | 14 | 30 | 36 | 28 | 16 | 10 | 5 |
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Can the CPI for urban non-manual employees represent the changes in the cost of living of the President of India?
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‘The Government and policy makers use statistical data to formulate suitable policies of economic development’. Illustrate with two examples.
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"You have unlimited wants and limited resources to satisfy them." Explain this statement by giving two examples.
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How will you choose the wants to be satisfied?
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What are your reasons for studying Economics?
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Statistical methods are no substitute for common sense. Comment with examples from your daily life.
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There are many sources of data.
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Which average would be suitable in the following case?
The average intelligence of students in a class.
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Which average would be suitable in the following case?
The average intelligence of students in a class.
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Which average would be suitable in the following case?
When quantities of the variable are in ratios.
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Which average would be suitable in the following case?
When quantities of the variable are in ratios.
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Which average would be suitable in the following case?
In case of an open-ended frequency distribution.
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Which average would be suitable in the following case?
In case of an open-ended frequency distribution.
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