Jawaharlal Nehru Technological University, Hyderabad MBA-I Semester Supplementary Examinations July 2010 STATISTICS FOR MANAGEMENT Question paper

Code No: 11003

Time: 3hours Max.Marks:60

Answer any Five questions
All questions carry equal Marks

1. Explain the difference between classification and Tabulation of data and write a brief
note on format of a table and also explain the rules for entering the data into a table.

2. Explain different methods for collecting primary and secondary data.

3. Explain different types of Scales used in Research.

4. Calculate Mean, Median and Mode from the following data
Mid Values 115 125 135 145 155 165 175 185 195
Frequencies 6 25 48 72 116 60 38 22 3

5. The following facts were gathered before and after an industrial dispute
Before Dispute After Dispute
No. of Workers
Mean Wages
Median Wages
Variance of Wages
516
Rs.49.50
Rs.52.70
100
508
Rs.51.75
Rs.50
121
Compare the position before and after the dispute in respect of
a) Total Wages b) Standard Deviation c) Skew ness
d) Median Wages e) Coefficient of variation f) Modal Wages

6.a) Explain different types of Index Numbers and methods for construction of index
numbers
b) Calculate four yearly moving average from the following data,
Year 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Value 50 36.5 43 44.5 38.9 38.1 32.6 41.7 41.1 33.8
Cont…2

7. Five types of fertilizers are applied to four varieties of potatoes, each planted on five
plots of land of the same size and fertility. The yields are shown in the following data,
Fertilizers
Potatoes
1 2 3 4 5
A 34 38 44 40 42
B 50 38 46 52 44
C 42 36 50 46 48
D 38 44 52 36 42
Test whether i) The effects of fertilizers and ii) the effects of potato varieties are
significant on the yield of potatoes.

8. Four coins are tossed 320 times and the number of heads obtained were recorded as
follows
No of Heads 0 1 2 3 4
Frequency 15 102 108 68 27
Can we regard all the coins as unbiased?