1. What are the different methods of collecting Primary data? Which of these is most reliable and why?
2. The frequency distribution of weight in grams of mangoes of a given variety is given below. Compute Arithmetic Mean and Median.
Weight in grams 410-419 420-429 430-439 440-449 450-459 460-469 470-479
Number of mangoes 14 20 42 54 45 18 7
3. What do you understand by Statistics? Describe its Scope.
4. Compute the Mean and Standard Deviation for the following data:
Value 90-99 80-89 70-79 60-69 50-59 40-49 30-39
Frequency 2 12 22 20 14 4 1
5. What do you understand by tabulation? Describe the purpose of tabulation. What precautions would you take in tabulating statistical data?
6. What do you understand by Regression? Describe the different properties of Regression.
7. Given table gives the Index number of Security prices of joint stock
Company pertaining to shares and debentures:
Share Price Index 73.2 85.8 78.9 75.8 77.2 81.2 93.8
Debenture Price Index 97.8 99.2 98.8 98.3 98.3 96.7 97.1
Find Rank Correlation coefficient.
8. Fit a straight line trend and calculate the trend values for the output of sugar. Also compute the sugar output for 2009.
Year 2002 2003 2004 2005 2006 2007 2008
Output (‘000 bags) 90 100 104 88 98 106 110