M.Com. DEGREE EXAMINATION, NOVEMBER 2017
Third Semester
Commerce
ADVANCED BUSINESS STATISTICS
(CBCS 2011 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. What is secondary data?
2. What do you mean by the term sampling?
3. What is standard error?
4. What is explained variation?
5. Explain the term hypothesis.
6. What is alternative hypothesis?
7. What is graphic model in L.P?
8. What is multiple regression?
9. What is non-random sampling?
10. What is binomial distribution?
Sub. Code
1MCO3C2
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Part B 5 25)
Answer all questions, choosing either or
11. Explain in detail the Direct and indirect data
collection method.
Or
Explain the importance of statistics.
12. What are regression co-efficients? How are they
computed?
Or
Comment on the following result obtained from the
given data.
Coefficient of regression of Y on X is 4.2 and
Co-efficient of regression on X on Y is 0.5
13. Find out the co-efficient of correlation between
X and
42 44 58 65 89 98 66
50 45 53 58 65 76 58
Or
Point out the significance of nul hypothesis.
14. What is analysis of variance and where it is used?
Give two suitable example.
Or
Give a real life example where binomial distribution
is appropriate.
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15. In an L.P define
Solution
Optimal solution
Decision variables
Multiple solution and feasible solution.
Or
When is a T.P balanced? What is an imbalanced
transportation problem?
Part C 10 30)
Answer any three questions.
16. Define sampling. Explain the different methods of
sampling.
17. From the data given below about the treatment of 500
patients suffering from a disease. State whether the new
treatment is superior to the conventional treatment.
No. of patients
Favorable Not favourable Total
New 280 60 340
Conventional 120 40 160
Total 400 100 500
18. The following table shows the ages and blood pressure
of a person.
52 63 45 36 72 65 45 25
62 53 51 25 70 43 50 30
Obtain the regression equation of Y on X and find the
expected blood pressure of a person who is 49 years old.
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19. In a town 10 accident took place in a span of 50 days.
Assuming that the number of accident per day follows
poison distribution, find the probability that there will be
three or more accident in a day.
20. Determine an initial basic solution to the following
transportation problem. Compute the transportation cost
for the obtained solutions and write your conclusion.
To
D1 D2 D3 Supply
Q1 2 7 4 5
From Q2 3 3 1 8
Q3 5 4 7 7
Q4 1 6 2 14
Demand 7 9 18 34
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