Find class intervals of following series.

Mid Values	2	4	6	8	10
Frequency	3	2	6	4	3

3

(a)

Can there be any advantage in classifying things? Explain with an example from your daily life.

3

(a)

Use the data given below that relate to monthly household expenditure (in Rs) on food of 50 households and answer the questions.

1904	1559	3473	1735	2760	2041
1612	1753	1855	4439	5090	1085
1823	2346	1523	1211	1360	1110
2152	1183	1218	1315	1105	2628
2712	4248	1812	1264	1183	1171
1007	1180	1953	1137	2048	2025
1583	1324	2621	3676	1397	1832
1962	2177	2575	1293	1365	1146
3222	1396

(i) Obtain the range of monthly household expenditure on food.
(ii) Divide the range into appropriate number of class intervals and obtain the frequency distribution of expenditure.
(iii) Find the number of households whose monthly expenditure on food is:

3

(a)

Do you agree that classified data is better than raw data?

3

(a)

What is loss of information in classified data?

3

(a)

In a city 45 families were surveyed for the number of domestic appliances they used. Prepare a frequency array based on their replies as recorded below:

1	3	2	2	2	2
1	2	1	2	2	3
3	3	3	3	3	2
3	2	2	6	1	6
2	1	5	1	5	3
2	4	2	7	4	2
4	3	4	2	0	3
1	4	3

3

(a)

Distinguish between univariate and bivariate frequency distribution.

3

(a)

Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data.
28, 17, 15,22,29,21,23,27, 18, 12, 7, 2, 9, 4, 6, 1, 8, 3, 10, 5, 20, 16, 12, 8, 4, 33, 27, 21,15, 9, 3, 36, 27, 18,9,2,4,6,32,31,29, 18,14, 13, 15, 11, 9, 7, 1, 5, 37, 32, 28, 26,24, 20, 19,25, 19, 20

3

(a)

What is classification of data? What should be its characteristics?

3

(a)

Differentiate between spatial and chronological classification with example.

3

(a)

Distinguish between Absolute and relative frequencies

3

(a)

What is a cumulative frequency distribution? What are its two types?

3

(a)

What do you mean by loss of information in organized data?

3

(a)

How is inclusive series converted into exclusive series?

3

(a)

Differentiate between quantitative and qualitative classification

3

(a)