The weekly observations on cost of living index in a certain city for the year 2004 - 2005 are given below- Compute the weekly cost of living index- nbsp-Cost of living Index-Number of Students-Cost of living Index-Number of Students-1400-1500-1500-1600-1600-1700-5-10-20-1700-1800-1800-1900-1900-2000-9-6-2-

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Standard X

Mathematics

Class Interval

The weekly ob...

Question

The weekly observations on cost of living index in a certain city for the year 2004 − 2005 are given below. Compute the weekly cost of living index.

Cost of living Index Number of Students Cost of living Index Number of Students

1400−1500
1500−1600
1600−1700 5
10
20 1700−1800
1800−1900
1900−2000 9
6
2

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Solution

Let the assumed mean be A = 1650 and h = 100.

We know that mean,

Now, we have.

Putting the values in the above formula, we have

Hence, the mean is 1663.46.

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Q. The weekly observations on cost of living index in a certain city for the year 2004-2005 are given below. Compute the weekly cost of living index.

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Q. In a city, the weekly observations made on the cost of living index are given below.

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Represent the above information in the form of a histogram.

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190 - 200	2
Total	52

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Let the assumed mean be A = 1650 and h = 100. We know that mean, Now, we have. Putting the values in the above formula, we have Hence, the mean is 1663.46.

Let the assumed mean be A = 1650 and h = 100.

We know that mean,

Now, we have.

Putting the values in the above formula, we have

Hence, the mean is 1663.46.