B.B.A. (Semester III) (CBCS) 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 carries equal marks.
All questions are compulsory.
Use of calculator is allowed.
Q.1 Choose correct alternatives: 10
Lottery method is one of the following method of sampling.
Subjective Simple random
Stratified None of these
Which measure of dispersion is based on two extreme values of
ordered data?
Range Q.D
M.D. S.D.
Which of the following is not a central tendency of the data?
Mean Median
Mode Standard deviation
For drawing histogram classes are taken on X axis and on Y axis
is taken.
Frequency Cumulative frequency
Mid Point None of these
One single figure which tells the whole story i.e. which will represent
the data is called.
Average Dispersion
Correlation None of these
The correlation between temperature and sale of woolen clothes is
Zero Positive
Negative Can not be determined
Regression equations are used for
Prediction Calculation
Dispersion Tabulation
If one of the regression coefficient of two perfectly correlated variable
is 0.5, the other regression coefficient is
0.5 -0.5
2 None of these
Index number are used to find
Standard of living Real wage
Economic condition All of these
10) The line of regression of Y on X is 4Y-8Y+20=0 then the regression
coefficient byx is
0.5 2
8 20
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SLR-CB-16
Q.1 Fill in blanks: 04
The data collected by conducting a survey is called Data.
The Median of the series 18, 20, 11, 12, 17, 22, is
Laspeyre's Price Index no is
The unit less measure of dispersion is called as
Q.2 Answer any two of the following 14
Define Mean, Median and Mode.
Average monthly sale of certain departmental store for first 11 months
was Rs.56000. Due to repairs and renewal of the shop in the last month
the sales dropped down to Rs. 8000. Find the average sales in the year.
Describe advantages of sampling methods over Census method.
Q.3 Answer any two of the following 14
Write a short note on Histogram.
Two workers on the same job show the following results over long period
of time.
Working A Working B
Mean time of completing Job 30 25
Standard deviation 6 4
Which worker appears to be more consisting in completing Job
ii) Which worker is faster in completing Job
Write a note on relative and absolute measures of dispersion.
Q.4 Draw less than ogive curve and locate median. Also obtain mean and
standard deviation.
14
Class: 0-10 10-20 20-30 30-40 40-50
Frequency: 1 3 10 4 2
OR
What is meant by correlation? Describe Scatter diagram. Calculate Karl
Pearson's Coefficient of correlation between X and Y.
10 11 14 14 20 22 16 12 15 13
12 14 15 16 21 26 21 15 16 14
Q.5 Explain the terms base year, current year, weight in the construction of
Index number. From the following data find Fisher's price Index number.
14
Item Base year Current year
Price Qty Price Qty
A 4 31 5 42
B 5 26 6 32
C 7 49 8 53
D 4 32 4 35
OR
Define regression lines. For the following data find the regression lines of
Y on X and X on Y.
78 36 98 25 75 82 90 62 65 39
84 51 91 60 68 62 86 58 53 47
Estimate the value of Y when X 50