## Wednesday, August 31, 2016

• Wednesday, August 31, 2016
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Roll No.
Total No. of Questions : 07
BBA (Sem.–3rd)
Subject Code : BB-304
Paper ID : [C0216]
Time : 3 Hrs.
INSTRUCTION TO CANDIDATES :
1. Section –A, is Compulsory.
2. Attempt any four questions from Section-B.

Section –A
(a) Presentation of data
(b) Two characteristics a god average should poses .
(c) Two properties of regression coefficients.
(d) Two limitations of index number?
(e) The mean of 75 observations is 27. Later on it was discovered that one observation was wrongly read as 43 instead of the correct value was 53. Find the correct mean.
(f) Probable error of r.
(g) Splicing
(h) Multiplicative theory of probability.
(i) Two conditions under which poison distribution is used
(j) Represent he following data by a simple bar diagram:
 Year 2006-07 2007-08 2008-09 2009-10 2010-11 2011-12 Service Tax 38000 51000 60000 58000 69000 8000

Section-B
Q. 2. Define classification of table. Explain the purpose and methods of classification giving suitable examples.
Q. 3. Consider the following distribution:

 X 0-10 10-20 20-30 30-40 40-50 Y 12 18 20 25 23
Compute mean, median and mode.
Q. 4. (a) What is Dispersion? What purpose does a measure of dispersion serve?
(b) Distinguish between mean deviation and standard deviation
Q. 5. From the following data obtain the regression equation Y on X.
 X 40 50 38 60 65 50 35 Y 38 60 55 70 60 48 30
Also estimate Y when X=5
Q. 6. Calculate the trend values by the method of least squares. Also calculate the monthly increase in sales & trend values for 2012.

 Year 2001 2002 2003 2004 2005 2006 2007 Sales 125 128 133 135 140 141 143

Q. 7. (a) A bag contains 8 white and 4 red balls. Five balls are drawn at random. What is the probability that 2 of them are red and 3 white?
(b) A problem in statistics is given to five students A, B, C, D and E. Their chances of solving it are ½, 1/3, ¼, 1/5 and 1/6. What is the probability that he problem will be solved?