B.B.A. (Semester III) (CGPA) Examination Oct/Nov-2017
BUSINESS STATISTICS
Day Date: Thursday, 09-11-2017 Max Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions: Each question carry equal marks.
All questions are compulsory.
Use of calculator is allowed.
Q.1 Choose correct alternatives: 07
For a exhibition 5 student are to be selected from each class to work as
volunteers, which sampling method is used.
Simple random sampling Stratified random sampling
Systematic sampling None of these
The average of 10, 12, 4 and k is 8 then k is
10 12
14 9
The standard deviation of is.
0 7
7 1
From histogram can be determined.
Mean Median
Mode SD
Median is
Middle most value Most frequent value
Least frequent value Largest value
The correlation between advertisement and sell is
0 Positive
Negative None of these
If prices are in Rs. And Quantities are in Kg then price index numbers are

In Rs. In Kg
Unit less None of these
Q.1 Fill in blanks: 07
If Laspeyre's Index number is 120 and Paasche's index number is 130
then Fisher's index number is
Mean of is
Mode is the value.
Class width of class 20-24 is
can be obtained from histogram.
In perfect negative correlation, the correlation coefficient is
The intersection of two gives median.
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Q.2 Answer any two of the following: 14
Define
Measures of dispersion
Correlation
Regression
Information about the daily salaries of employees in firms A and B IS stated
below.
A B
No. of observation 60 40
Means 400 500
SD 10 11
Which firm gives more amount as Salary?
ii) Which firm has smaller variation in Salary?
iii) Find combined mean.
Write a note on Simple random Sampling.
Q.3 Answer any two of the following: 14
Write a short note on absolute and relative measure of dispersion.
Compute Mean and Standard deviation.
Class: 0-10 10-20 20-30 30-40 40-50
Frequency: 1 3 10 4 2
Following is the frequency distribution of the number of students according to
marks scored in a certain examination.
Marks: 0-19 20-39 40-59 60-79 80-99
No. of Students: 18 36 34 22 15
State the type of classification.
ii) Obtain class limits of the second class
iii) Obtain mid-point of fourth class
iv) How many students are getting the marks less than 59
The class interval of third class.
Q.4 From the following data. 14
32 47 47 53 67 62 14 92 17 87 63 23 8 13 58 33 27 36
42 48 85 90 49 69 46 56 27 40 79 73 55 48 42 30 69
Prepare a frequency distribution by exclusive method with class width 10.
Draw less than ogive curve and locate median from it.
OR
Obtain regression line for the following data.
2 3 5 7 8 10 12 15
2 5 8 10 12 14 15 16
Find estimate of: Y when X 6
ii) X when Y 20
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Q.5 Define Index number, Discuss the problems of
Selection of commodities
ii) Section of weights
iii) Choice of Base year in the construction of index numbers
14
Find price index number using Lamprey's method, Paasche's method and
Fisher's method.
Item Base year Current year
Price Quantity Price Quantity
A 9 5 15 5
B 8 10 12 11
C 4 6 5 6
D 1 4 2 8
OR
Explain regression. The regression equation are given by 8x-10y+66 and
40x-18y-214=0 Find:
Mean of x and Mean of y
ii) Correlation coefficient of
iii) Find σγ given that σx 3