ECO-07 SOLVED ASSIGNMENT 2018-19

2. Differentiate between primary data and secondary data. Describe the factors that affect the
choice of data to be used in investigations. (20)

3. (a) Find the missing frequency from the following data. (10)

Marks         0-10      10-20      20-30      30-40     40-50        50-60

No. of          15            25             30             –               30               20

students

Arithmetic mean of marks is 44.

 

(b) Calculate mode from the data given below: (10)

Profit (Rs. In
Lakh)                    0-5                  5-10           10-20            20-30          30-50

No of                       2                      3                   8                      9                  10

Companies

 

4. Calculate mean and standard deviation from the following distribution: (20)
Class                 10-20      20-30     30-40    40-50    50-60    60-70      70-80
Interval
Frequency          2               4               4           8              6             3                2

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6 Responses

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  2. Nafi san says:

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  3. Saba says:

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  5. Priti says:

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