GUG/W/18/788 1 P.T.O
Bachelor of Business Administration Part-I Second Semester Old
202 Statistical Methods for Business-II
P. Pages 2 GUG/W/18/788
Time Three Hours Max. Marks 80

Notes 1. All questions are compulsory.
2. All questions carry equal marks.
1. Define Regression. Explain objects of Regress Analysis.
8
For 52 students of class the regression equation of Marks in Statistics on the Marks in
Accountancy is 3y−5x +180 0. Mean Marks in Accountancy 44 variance of Marks
in Statistics 9/16. Find out Mean Marks in statistics and coefficient of correlation.
8
OR
You are given the following result for the Height and weight of 1000 policemen in
M.S.
Ax 168.00 cm x 7.00 cm r 0.6
Ay 70 kg y 10kg


Estimates
Two Regression Equation
ii) Height of a particular policeman whose weight is 80 kg
iii) Weight of a particular policemen who is 160 cm tall.
16
2. Fit the trend line by at least square method.
Year 2013 2014 2015 2016 2017
Sales in lakhs 427 612 521 495 490
8
Calculate 3 yearly moving average
Year 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
Sales
(Millions in
Rs.)
3 4 8 6 7 11 9 10 14 12
8
OR
Calculate 4 yearly moving average from the following data.
Year 2004 2005 2006 2007 2008 2009 2010 2011
Annual Sales
(in crores)
36 43 43 34 44 56 34 24
16
*0600*
GUG/W/18/788 2
3. Two treatment A and B were tried to control a certain type of plant diseases following
result were obtained.
A 240 plant were examined 48 were found infected
B 240 plant were examined 12 were found infected
Is treatment B superior to treatment A. The table value of x2 for one degree of freedom at
level of significance is 3.841.
8
A sample analysis of examination result of 200 MBA was made. It was found that 46
students had failed, 68 secured a third division, 62 secured a second division rest were
place in first division. Are these figures commensurate with general examination result
which is in the ratio of for various categories respectively. Table value of x2 for 3
degree of freedom at level of significance is 7.82.
8
OR
Three Hundred digit were chosen at random from a set of Table. Following table given the
frequencies of the digit.
Digits 0 1 2 3 4 5 6 7 8 9 Total
Frequency 28 29 33 31 26 35 32 30 31 25 300
Using x2 test assess the hypothesis that the digit were distributed in equal number in the
table of value of x2 for 9 degree of freedom is 16.92.
16
4. A speak truth in 75% cases and B in 80% of the cases. In what percentage of the cases are
they likely to contractict each other in stating the same fact.
8
A problem in game cricket is given to 4 players. Sachin, Rohit, Virat Dhoni whose
chances of solving it are 50% and 60% respectively. What is the probability
that the problem will be solved.
8
OR
A problem in statistics is given to three students, Rahul, Rashi and Rudra whose chances
of solving it are 1
2
1/3 1
4
. What is the probability that the problem will be solved.
8
What is the chance that a year 1980 in the month January should have 5th Monday.
8
5. Write short answers.
Concept of Regression.
4
Components of Time Series.
4
Uses of x2 test.
4
Binomial Distribution.
4