## OUR OWN PUBLICATION FROM 1ST JULY, 2018 FOR B.COM

1. B.COM FIRST SEMESTER COMPLETE NOTES (CHOICE BASED) WITH SOLVED FINANCIAL ACCOUNTING BOOK
2. B.COM 3RD SEM COMPLETE NOTES WITH SOLVED BOOKS OF:
*BUSINESS STATISTICS SOLVED PAPERS OF LAST 7 YEARS
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## Sunday, February 24, 2013

### Dibrugarh university - Business Statistics 2012

1. (a). Mention the characteristics of a good measure of dispersion.
(b) Calculate standard deviation for the following data:
 Mid. Value 15 25 35 45 55 66 Frequency 18 22 40 32 18 10

Or
(c) Discuss the importance of a good measure of dispersion.
(d) Discuss the advantages and disadvantages of sample survey of collecting data.

2. (a) Write the properties of coefficient of correlation.
(b) From the following data fit a regression line of Y on X:
 X: 52 63 45 36 72 65 47 25 Y: 62 53 51 25 79 43 60 33

Or
(c) Prove that karl person’s coefficient of correlation is independent of change of origin and change of scale.
(d) Calculate karl person’s coefficient of correlation from the data given below:
 X: 78 89 99 60 59 79 68 61 Y: 125 137 156 112 107 136 123 108

3. (a) Why is fisher’s index number called ideal index?
(b) Distinguish between Price and quantity index numbers. Also mention five limitations of index number.

Or

(c) Mention the different uses of index number in the study of economics and commerce.
(d) Calculate price indices for the year 1993 from the following using (i) Laspeyre’s method and (ii)Fisher’s method
 Commodity Price (1990) Quantity (1990) Price (1993) Quantity (1993) A B C D 6 2 4 10 50 100 60 30 10 2 6 12 56 120 60 24

4. (a) Discuss the utility of the study of time series.
(b) Using the least square principle, find the trend values from the following data:
 Year: 1990 1991 1992 1993 1994 1995 1996 Production: 83 60 54 21 22 13 23

Or

(c) Write short notes on:
(i) Least square method
(ii) Simple average method
(d) Calculate trend using least square method and estimate the value of scales for the year 2007 from the following data:
 Year: 2001 2002 2003 2004 2005 Sales: 100 120 140 160 180

5. (a) Explain the objectives of business forecasting.
(b) Discuss the steps of forecasting.

Or

(c) Explain the time series analysis as a tool of forecasting.
(d) Explain any three methods of forecasting.