BBS First Year Business Statistics  MGT202  Model Question 2020  TU  Set A  Download in PDF.
Group ‘A’
Brief Answer Questions.Attempt All Questions. (10X2=20)
1) The mean of 200 items was 50. Later on it was found that two items were wrongly taken as 92 and 8 instead of 192 and 88. Find the correct mean.
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Calculate the lower and upper quartiles.  

Marks  Below 25  2529  3034  3539  4044  Above 44 
Students  5  12  22  25  17  9 
Calculate the price index number from the following data by simple aggregative method.  

Commodities  A  B  C  D  E 
Price in 2075  125  105  260  150  250 
price in 2076  125  155  250  160  300 
Demand  

Strategy  D1  D2  D3 
S1  300  100  80 
S2  200  120  60 
S3  80  60  20 
Group ‘B’
Descriptive Answer Questions.Attempt any FIVE Questions.. (5X10=50)
List the five number summary and prepare a boxandwhisker plot from the follwing.  

Class Size  2030  3040  4050  5060  6070  7080 
Frequency  10  12  25  35  40  50 
2x+5yz = 3, 4x+3y+2z = 1 & x+2y+3z = 5
(i) Time Reversal Test and (ii) Factor Reversal Test.
Commodity  2018  2019  
Price (Rs)  Quantity (Units)  Price (Rs)  Quantity (Units)  
A  8  60  12  58 
B  4  110  4  125 
C  6  70  8  70 
D  12  40  14  38 
Fit straight line trend by the method of least square to the data given below.  

Year  2013  2014  2015  2016  2017  2018  2019 
Sales(000 units)  15  16  17  16  19  23  25 
them in two markets A and B. The sales of papers during one year are given below:
Markets 
Papers 

I 
II 
III 

A 
12,000 
5,000 
23,000 
B 
14,000 
22,000 
13,000 
Net profits of two companies in millions of rupees, find which company shows the greater consistency in the net profit.Justify your answer with statistical evidence.  

Company A  18  19  23  19  25  23  27 
Company B  17  18  22  23  24  25  25 
Group ‘C’
Analytical Answer Questions.Attempt any TWO Questions. (2X15=30)
17) A family income and its percentage expenditure on food for 100 families gave the following bivariate frequency distribution. Find out if there exists any relationship between family income and expenditure on food and interpret the result. Also test the significance of the result. Estimate the percentage expenditure on food when family income = Rs 90,000.
Food Expenditure (%) 
Family Income (000Rs) 

2040 
4060 
6080 
80100 
100120 

15 
 
 
 
3 
7 
20 
 
4 
9 
4 
3 
25 
7 
6 
12 
5 
 
30 
3 
10 
19 
8 
 
Describe the various characteristic features of the frequency distribution.  

Expenditure (Rs.00)  3040  4050  5060  6070  7080  8090  90100  100110 
Number of students  10  15  28  33  40  35  25  14 
BBS First Year Business Statistics CodeMGT202 Model Question 2020 TU Set  A  Download in PDF.
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