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

--- Content provided by FirstRanker.com ---

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

--- Content provided by​ FirstRanker.com ---

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 .

--- Content provided by​ FirstRanker.com ---

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 :

--- Content provided by‍ FirstRanker.com ---

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

--- Content provided by⁠ FirstRanker.com ---

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

--- Content provided by⁠ FirstRanker.com ---

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

--- Content provided by​ FirstRanker.com ---

What is Normal Probability Distribution Function?
Q9.
What is Marginal Probability?
Q10. What is the addition law of probability?
1 | M-75830

--- Content provided by⁠ FirstRanker.com ---

(S12)-629

---

SECTION-B
UNIT-I
Q11. What are the different sources of primary and secondary data?
Q12. Discuss the probability and non-probability sampling techniques.

--- Content provided by‌ FirstRanker.com ---

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

--- Content provided by​ FirstRanker.com ---

57
59
50
55
56

--- Content provided by‌ FirstRanker.com ---

62
64
57
66
58

--- Content provided by​ FirstRanker.com ---

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?

--- Content provided by​ FirstRanker.com ---

Price
242
216
215
236

--- Content provided by FirstRanker.com ---

232
235
272
Number of units
23.9 23.0 22.9

--- Content provided by⁠ FirstRanker.com ---

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).

--- Content provided by⁠ FirstRanker.com ---

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.

--- Content provided by FirstRanker.com ---

2 | M-75830
(S12)-629

---