IGNOU| ELEMENTS OF STATISTICS (ECO - 07)| QUESTION PAPER – (DEC - 2022)| (BDP)| ENGLISH MEDIUM
BACHELOR'S DEGREE PROGRAMME
(BDP)
Term-End Examination
December - 2022
ECO-07
ELEMENTS OF STATISTICS
Time: 2 hours
Maximum Marks: 50
Note: Attempt any five questions. All questions carry
equal marks. Simple calculator is allowed.
1. Discuss the importance of Statistics in Business. 10
2. Explain the requisites of a good statistical table. 10
3. (a) Discuss the three sources of errors in Statistics. 5
(b) Explain the questionnaire
method of Primary Data Collection. 5
4. (a) Describe the importance of visual presentation of
data. 5
(b) What are the
objectives of classification? 5
5. Calculate the Arithmetic Mean from the following data:
10
|
Total Sales |
Number of Salespersons |
|
0-5 5-10 10-25 25-50 |
3 12 25 10 |
6. Calculate the Standard Deviation from the following
data: 10
|
Bursting Pressure (lbs) |
Number of Bags |
|
5-10 10-15 15-20 20-25 25-30 |
2 9 29 54 6 |
7. Draw a histogram and a frequency polygon from the
following data: 5+5
|
Classes |
f |
|
10-20 20-30 30-40 40-50 50-60 |
10 20 30 25 10 |
8. (a) From the given data, find the coefficient of
skewness.
Q1=58,
Md=59 and Q3 = 61
(b) Find the
combined mean, if
***
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