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Statistics

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 find out 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

Statistics and Probability, Statistics

• Category:- Statistics and Probability
• Reference No.:- M99447

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