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Wednesday, August 31, 2016



Roll No.
Total No. of Questions : 07
BBA (Sem.–3rd)
BUSINESS STATISTICS
Subject Code : BB-304
Paper ID : [C0216]
Time : 3 Hrs.
INSTRUCTION TO CANDIDATES :
1. Section –A, is Compulsory.
2. Attempt any four questions from Section-B.

Section –A

1. (a) What is the relation between Mean, Median and Mode ?
(b) What is Binomial Distribution ? Discuss its features.
(c) What are the limitations of Index numbers ?
(d) Differentiate between Arithmetic Progression and Geometric
Progression.
(e) What are the merits of diagrammatic representation of statistical
Data ?
(f) Differentiate between Mean Deviation and Standard Deviation.
(g) Differentiate between Correlation and Regression.
(h) Define Coefficient of Variation.
(i) Discuss the classical ap proach of probability.
(j) Discuss the properties of Normal Distribution.

SECTION-B

2. (a) Define Standard Deviation. Discuss its properties.
 (b) In two factories A and B, engaged in the same industry in the area,
the average week wages in rupees and the S.D. are as follows :
Factory
Average
S.D.
No. of employees

A
34.5

5.0
476
B
28.5

4.5
524

 (i) Which factory A or B pays out a larger amount on weekly
wages?
(ii) Which Factory A or B has greater variability in individual wages?

3. In a genetic survey, the data of height of fathers (in cms) and height of sons (in cms) were collected. Data are as follows :
Father
165
166
167
167
168
169
171
173
170
166
Son
167
168
164
168
171
170
169
170
169
165

Find the two lines of regression. Calculate correlation coefficient and
expect the average height of son when the height of father is
168.2 cms.

4. Given the following data.
Items
2009
2010

Price
Quantity
Price
Quantity

Rice
4
6
5
6
Oil
30
2
33
2
Tea
8
1
9
1
Washing powder
6
½
8
1
Sugar
4
4
5
5
Milk
4
3
6
3

5. (a) State the different methods used for diagrammatic representation
of statistical data and indicate briefly the advantages and
disadvantages of each one of them.
(b) In the frequency distribution of 100 families given below, the
number of families corresponding to expenditure groups 20-40
and 60-80 are missing from the table. However, median is known
to be 50. Find the missing frequencies.
Expenditure
0-20
20-40
40-60
60-80
80-100

No. of families
14
?
27
?
15


6. Estimate the trend value by the 4-yearly moving averages method for
the following data:
Year
1997
1998
1999
2000
2001
2002
2003
2004
2005
2066
2007
2008
Value
12
18
26
32
40
60
76
94
100
108
98
90

7. (a) What do you mean by probability? Discuss the Laws of probability?
(b) A salesman is known to sell a product in 3 out of 5 attempts while another salesman in 2 out of 5 attempts. Find the probability that
(i) No sale will take place when they both try to sell the product

(ii) Either of them will succeed in selling the product.

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