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Roll No.
Total No. of Pages : 03
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Total No. of Questions : 09
BBA (2013 to 2017)/BRDM/B.SIM (2014 & Onwards) (Sem.-3)
BUSINESS STATISTICS
Subject Code : BBA-304
M.Code : 70625
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Time : 3 Hrs.
Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B consists of FOUR Sub-sections: Units-I, II, III & IV.
- Each Sub-section contains TWO questions each, carrying TEN marks each.
- Student has to attempt any ONE question from each Sub-section.
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SECTION-A
- Answer briefly :
- Limitations of Statistics
- Frequency Distribution
- Uses Lorenz curve
- Importance of Correlation Analysis
- Standard error of estimate
- Regression Analysis
- Uses of Index numbers
- Uses of time series in business
- Subjective approach of probability
- Conditional probability
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SECTION-B
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UNIT-I
- Highlight the role, importance and scope of statistics in business decision making in detail.
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- a) Discuss uses of measures of dispersion in business decision making.
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b) Calculate Mean and Variance of the following Data :
Size 14 16 18 20 22 24 26
Frequency 12 13 14 15 13 12 16
UNIT-II
- a) Calculate Karl Pearson's Coefficient of Correlation between expenditure and sales from data given below :
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Advertising expenses 39 65 62 90 82 75 25 ('000)
Sales (lakh Rs.) 47 53 58 86 62 68 60
b) Given the following information, find the number of items (n) where rxy = 0.8, Sxy = 60, sy = 2.5, Sx² = 90, where x and y are the deviations from the respective means.
- Obtain two regression equations, regression coefficients and correlation coefficient from the given data :
X 26 18 17 26 15 25--- Content provided by FirstRanker.com ---
Y 14 13 9 14 10 15
UNIT-III
- Construct index number of price and index number of quantity from the following data using :
a) Laspeyre's method
b) Paasche's formula--- Content provided by FirstRanker.com ---
c) Dorbish and Bowley's method
d) Fisher's Ideal Index method from following data.
Commodities Base Year Current Year
Price (Rs.) Quantity (Kg) Price (Rs.) Quantity (Kg)
A 2 18 4 16--- Content provided by FirstRanker.com ---
B 5 10 6 25
C 4 14 5 10
D 6 11 9 22
- a) Explain methods of measuring seasonal variations.
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b) Also find seasonal variations by the ratio to trend method, from the following data :
Year I-Qr II-Qr III-Qr IV-Qr
1995 30 40 36 34
1996 34 52 50 44
1997 40 58 54 48--- Content provided by FirstRanker.com ---
1998 54 76 68 62
1999 80 92 86 82
UNIT-IV
- a) A bag contains four red counters and six black counters. A counter is picked at random from the bag and not replaced. A second counter is then picked. Calculate the following probabilities :
i) The second counter is red, given that the first is red.--- Content provided by FirstRanker.com ---
ii) Both the counters are red and
iii) The counters are of different colours
b) Two events D and E are found to have the following probability relationships : P(D) = 1/3 P(E) = 1/4 and P(D or E) = 1/2. Calculate the following probabilities :
i) P(D and E),
ii) P(D/E) and--- Content provided by FirstRanker.com ---
iii) P(E/D).
- a) In a group of 50 students, 30 study French or German. If 20 study French and 15 study German, find the probability that a student studies French and German.
b) In an office, there are three clerks processing incoming mail. First clerk processes 35 percent, the second clerk processes 40 percent and third clerk processes 25 percent incoming mails. Those three has an error rate of 0.04, 0.06 and 0.03 respectively. A mail selected at random from day's output is found to have an error. The post master wishes to know the probability that the mail was processed by first, second and third clerk.
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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This download link is referred from the post: PTU BBA 3rd Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University
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