Download BU (Bangalore University) MBA 1st Semester 2015 Feb Statistics for Management Question Paper

Download BU (Bangalore University) MBA (Master of Business Administration) 1st Semester 2015 Feb Statistics for Management Question Paper

|llllllllllllllllllllllllllllll|||l PG ? 851
I Semester MBA. Degree Examination, January/February 2015
(CBCS) (2014 ? 15 & Onwards)
Paper ? 1.4 : STATISTICS FOR MANAGEMENT
Time :3 Hours Max. Marks : 70
Instruction : Statistical tables and calculators are allowed.
SECTION ?A
Answerany five of the following questions. Each question carriesfive marks.
Answers totheoretical questions should not exceed 250 marks. (5x5=25)
1. What is sampling ? Discuss different sampling techniques and their relevance
in statistical inference.
2. The data given below pertains to the patients admitted into a corporate Hospital
during the years 2007 and 2013. Fit a straight line trend by the method of least
squares and estimate the number of patients for the years 2014 and 2015. A
graph is not necessary
- Years 2007 2008 2009 2010 2011 2012 2013
Patients in lakhs' 19 21 25 29 ' 26 27 32
3. Define the following concepts :
a) Null? hypothee?is and?alterhative hypothesis.
b) One Tailed and Two Tailed tests.
c) Point estimation and internal estimation.
d) Type I and Type II errors.
e) Confidence limits.
P.T.0.

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PG?851 -2- _
4. A survey of 500 students yielded the data given below : Using Chi-square
analysis and assuming a 5 % significance level, find whether mentoring has an
impact on the performance index.
Performance Mentoring No
. Total
Index done mentoring
Very high 200 50 250
Average 150 50 200
Very low 25 25 50
375 1 25 500
5. Illustrate and explain the concept of Kurtosis with suitable diagrams. Also
illustrate and explain the concept of skewness and state the formulae for the
absolute and relative measures of skewness.
6. A company wants to select a team leaderfrom among the following candidates :
a) Male, age 40
b) Male, age 43
0) Female, age 38
d) Female, age 29
e) Male, age 39
What is the probability that the team leader selected, will be
1) Either male or aged above 41 years ?
2) Either female or aged below 35 years.
7. What are non parametric tests ? Discuss with suitable examples the different
non parametric tests and state their relevance.

PG ? 851
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11. The weekly wages of 2000 workers are normally distributed. Its Mean and
Standard Deviation are Rs. 140 and Rs. 20 respectively. Estimate the number
of workers whose weekly wages will be
a) Between Rs. 120 and Rs. 130
b) More than Rs. 170
(3) Less than Rs. 165
d) Between Rs. 135 and Rs. 145
e) Between Rs. 138 and Rs. 150.
This is a compulsory Section.
SECTION ?C
(1x15=15)
12. In a class of 10 students the marks scored in the subjects of Sociology and
Mathematics are listed as below. From the data find
a) The two regression coefficients
b) The two regression equations
0) The most likely marks in"Statistics when marks in Economics are 80
d) The most likely marks in Economics when marks in Statistics are 60
e) Also find the Correlation Coefficient between them :
Marks in Sociology
85
77
65
51
82
48
91
42
72
58
Marks in Mathematics
77
81
55
62
66
65
88
49
69
70