B.B.A. (Semester III) (CBCS) Examination Nov/Dec-2018
BUSINESS STATISTICS
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Q.1 Choose the alternatives given below. 14
For perfect Negative correlation r is equal to

0 2
Sampling method is as compare to census method.
Economical Less time consuming
Both and None of these
Mode of the series 5 is
6 2
9 3
If sum of observation is 500 and mean is 10, then n
21 50
25 5
The relation between the correlation coefficient and regression coefficient is


None of these
Index number is an ideal index number.
Fisher Index Number Laspeyre's Index Number
Paasche's Index Number All of these
If the correlation coefficient between and is 0.4 then, between
and is
0.4
-0.4 0
is unit less measures of dispersion.
SD Range
CV None of these
Mode can be determined graphically by using
Less than Ogive Greater than Ogive
Histogram None of these
10) If group of 10 females having mean Wt. 50 kg and group of 30 males
having mean Wt. 70 kg then their combined mean is
70 65
55 50
11) If two variables are changes in same direction and in proportion, then there
is correlation.
ve ve
Zero None of these
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SLR-CI-11
12) Fisher index number is mean of Laspeyre's and Paasche's
index number.
Geometric Arithmetic
Weighted Combined
13) Which of the following cannot be located graphically?
Mean Mode
Median None of these
14) The difference between the upper limit and lower limit is known as
Class frequency Class interval
Class width Class limit
Q.2 Answer the following: 14
Explain the concept of Dispersion with illustration.
The price of Tata tea of grade A and grade B are Rs. 120 per kg and Rs. 90
per kg respectively. If these two grades of tea are mixed together in the
ratio of 3:4. Find the average price of mixture.
Q.3 Attempt the following: 14
Explain the concept of classification and its types with example.
Calculate CV from following observations.
280, 180, 96, 98, 104, 75, 80, 94
Q.4 Attempt any one of the followings: 14
Define the concept of regression. Find two lies of regression. Find the value
of X when Y 32 and find Y when X 16.
X 12 13 15 17 19 20 21 22 24 26
Y 30 32 28 26 22 19 14 15 12 10
Explain the concept of measures of central tendency. Draw two Ogive
curves and locate median from the following data.
Score 0-10 10-20 20-30 30-40 40-50
No. of students 20 27 54 44 15
Q.5 Attempt any one of the followings: 14
From the following data calculate Laspeyre's, Paasche's and Fisher's price
Index number and Quantity Index number.
Commodity
2017 2018
Price Quantity Price Quantity
A 14 10 20 7
B 55 15 50 18
C 95 5 120 4.5
D 6 22 7 30
Define correlation and types of correlation. Following are the value of import
of raw data and export of finished products in suitable units.
Export 56 58 60 62 64 68 69 70 72 70
Import 102 98 100 95 82 88 75 70 72 76
Calculate the Karl Pearson's correlation coefficient between the import and
export.