FALL-2017
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Master of Business
Administration - MBA Semester 1
MBA103 - Statistics for Management
SET-I
1
Write Short notes on following methods of classification in Statistical Survey
i.
One Way Classification.
ii.
Two Way Classification
iii.
Manifold Classification.
A One Way Classification.
Two Way Classification
Manifold Classification.
Answer: a. One-way classification – Classification
done according to a single attributes or variable is known as one way
classification.
Figure below depicts the
number of students who has secured more than 60% in various sub-modules of
2
What do you mean by Statistical Averages? List various requisites of a Good
Average.
A Statistical Averages.
Requisites of a Good
Average.
Answer: The statistical
average or simply an average refers to the measure of middle value of the data
set. The objectives
3
In a beauty contest, the ranks provided by three different judges to 10
competitors are given in following table. Find out which pair of judges are
more associated in term of same pattern for ranking
|
Competitors
|
A
|
B
|
C
|
D
|
E
|
F
|
G
|
H
|
I
|
J
|
|
Judge 1
|
3
|
4
|
6
|
7
|
9
|
8
|
2
|
10
|
1
|
5
|
|
Judge 2
|
4
|
5
|
6
|
8
|
7
|
10
|
1
|
9
|
2
|
3
|
|
Judge 3
|
5
|
7
|
9
|
8
|
10
|
6
|
3
|
4
|
1
|
2
|
A Calculation of Rank
Correlation
Interpretation
Answer: With a view
to find out the Rank Correlation between all the 3 judges we will have to find
the correlation between the following:
(i) 1st and 2nd judge
(ii) 1st and
SET-II
1
Write short notes on
a.
Type I and Type II error
b.
Level of Significance
c.
Null Hypothesis
d.
Two–tailed Tests and One–tailed Tests
e.
Test Statistics
a. Type I and Type II
error
b. Level of Significance
c. Null Hypothesis
d. Two–tailed Tests and
One–tailed Tests
e. Test Statistics
Answer: Type I error: Rejecting a true
null hypothesis. The probability of a type I error is indicated by alpha (α).
Type II error: Not rejecting
a
2
Marks of 10 students out of 150 is given below
60,
110, 120, 135,110, 96, 145, 55, 95 & 125
What
is the average marks of a class, Calculate by direct & shortcut methods?
A Calculation by Direct
method
Calculation by Short cut
method
Answer: Direct method
3
Production for last 7 years of XYZ ltd is given in following table
Year
2009
2010 2011
2012 2013
2014 2015
Production(in
Tons) 8 12 13
17 25
22 30
Based
on above data forecast the production for year 2016 & 2017.
A Fitting of straight
line
Production for year 2016
Production for year 2017
Answer: The trend line can be fitted by using the
method of least squares for the
FALL-2017
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