DISTANCE EDUCATION
B.B.A. (CS)/B.B.A. (Lateral) DEGREE EXAMINATION,
MAY 2017.
BUSINESS STATISTICS
(2005 onwards)
Time Three hours Maximum 100 marks
PART A — × 8 40 marks)
Answer any FIVE questions.
All questions carry equal marks.
1. Explain the process of drafting the questionnaire.
2. Discuss the types of classification of data.
3. Draw a histogram for the following data
Variable Frequency
100-110 11
110-120 28
120-130 36
130-140 49
140-150 33
150-160 20
160-170 8
Sub. Code
23
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4. From the following data of the marks obtained by
60 students of a class, calculate the arithmetic mean
Marks No. of students
20 8
30 12
40 20
50 10
60 6
70 4
Let the marks be denoted by X and the number of
students by f .
5. What are the different measures of dispersion?
6. What are the Spearman's correlation coefficient?
7. Calculate median from the following data
Marks 0-10 10-30 30-60 60-80 80-90
No. of students 5 15 30 8 2
8. Calculate mean deviation from the following series
X 10 11 12 13 14
f 3 12 18 12 3
PART B — × 15 60 marks)
Answer any FOUR questions.
All questions carry equal marks.
9. Discuss the general rules of tabulation.
10. Describe the methods of constructing index numbers.
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11. Find the geometric mean for the data given below
Marks Frequency
4-8 6
8-12 10
12-16 18
16-20 30
20-24 15
24-28 12
28-32 10
32-36 6
36-40 2
12. Calculate Pearson's coefficient of skewness
X 12.5 17.5 22.5 27.5 32.5 37.5 42.5 47.5
f 28 42 54 108 129 61 45 33
13. Calculate coefficient of correlation from the following
data
X 100 200 300 400 500 600 700
Y 30 50 60 80 100 110 130
14. Obtain the lines of regression from the following data
X 4 5 6 8 11
Y 12 10 8 7 5
Verify that the coefficient of correlation is the geometric
mean of the two coefficients of regression.
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15. The sales of a company for the years 2006 to 2012 are
given below
Year 2006 2007 2008 2009 2010 2011 2012
Sales (in million) 32 47 65 92 190 132 275
Find trend values by using the equation X
YC ab and
estimate the value for 2015.