Download PTU B.Com 2020 Dec 2nd Sem 75830 Business Statistics Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Com. (Hons) (2018 Batch) (Sem.?2)
BUSINESS ST ATISTICS

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Subject Code : BCOM-GE-201 -18
M.Code : 75830
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .

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SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B cons ists of F OUR Sub-sec tions : Un its-I, II, III & IV.
3 .

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Eac h Sub-section contains TWO questions each , carry in g T EN ma rks e ach .
4 .
Students have to atte mpt an y ONE ques tion from each Sub-section.
SECTION-A
Write briefly :

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Q1.
What is the difference between the inferential statistics and descriptive statistics?
Q2.
What is Sampling Distribution?
Q3.

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What is difference between parameter and statistics?
Q4.
What are properties of median?
Q5.
What is Quartile Deviation?

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Q6.
What is R-square?
Q7.
What are the properties of regression coefficient?
Q8.

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What is Normal Probability Distribution Function?
Q9.
What is Marginal Probability?
Q10. What is the addition law of probability?
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SECTION-B
UNIT-I
Q11. What are the different sources of primary and secondary data?
Q12. Discuss the probability and non-probability sampling techniques.

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UNIT-II
Q13. What is sampling distribution? What is the need of sampling distribution? What is the
procedure to produce a sampling distribution of mean?
Q14. Find the mean, standard deviation and variance of the following data :
X

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57
59
50
55
56

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62
64
57
66
58

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UNIT-III
Q15. What is Correlation? What is the difference between rank correlation and simple
correlation? What is non-linear correlation?
Q16. The following data shows price and number of units sold at different price levels. Find
the effect of price on the number of units sold using least square method?

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Price
242
216
215
236

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232
235
272
Number of units
23.9 23.0 22.9

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28.8 29.2
26.4 24.8
UNIT-IV
Q17. Solve the following probability problems ?
a) If P (A and B) = 0.5 and P(B) = 0.7, find P(A\B).

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b) If P(A) = 0.6 and P(B) = 0.5 and P(A and B) = 0.7, find P(A\B)
Q18. What is Poisson distribution? What are the essential properties of Poisson distribution?
What is the difference between binomial distribution and Poisson distribution?
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.

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