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Measures of Central Tendency
Average age of the people of a country is shown in the following table:
|
Age (years) |
10-20 |
20-30 |
30-40 |
40-50 |
50-60 |
|
People (000) |
30 |
32 |
15 |
12 |
9 |
|
Age |
People (000) f |
M.V. (X) |
fx |
|
10-20 20-30 30-40 40-50 50-60 |
30 32 15 12 9 |
15 25 35 45 55 |
450 800 525 540 495 |
|
Σ f =98 |
Σ fx = 2810 |
Sponsor Area
The following table gives production yield in kg. per hectare of wheat of 150 arms in a village. Calculate the mean, median and mode production yield.
|
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 |
The size of land holdings of 380 families in a village is given below. Find the median size of land holdings.
|
Size of Land Holdings (in acres) |
Number of families |
|
less than 100 100-200 200-300 300-400 400 and above |
40 89 148 64 39 |
What do you mean by 'Average'?
Pocket expenditures of 6 students are (Rs.) 6,12,18,24,30 and 36 respectively. Find out arithmetic mean.
Name various kinds of statistical averages?
Give formula of weighted averages.
Give formula of calculating arithmetic average of a continuous series.
What is arithmetic mean?
Define median.
Define mode.
Sponsor Area
Sponsor Area