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Posted Date: 22 Jan 2011 Posted By:: Faizan Ahmad Member Level: Gold Points: 5 (₹ 1)

2009 University of Allahabad Commerce Allahabad University, B.Com. (PartII) Examination, Business Statistics University Question paper
B.Com. (PartII) (New Course) Examination, 2009 Business Statistics Paper: Ninth Time Allowed: Three Hours] [Maximum Marks: 100
Note: This paper is divided into part 'A' and Part'B'. Answer all questions from Part 'A' and three questions from Part'B'. Use of calculator is prohibited.
Part'A' Note: Attempt all eight questions. Answer in not more than 100 words. Each question carries 5 marks
1. Distinguish between a 'Schedule' and 'Questionnaire'. 2. What is meant by 'Universe and 'Sample'? 3. Explain the term 'Dispersion'. 4. state the properties of Normal Distribution. 5. what is Ttest? 6. A bag contains 5 white, 4 black, 3 yellow and 4 red balls. What is the percentage probability of getting a black or red ball at random in a single drawn of one ball? 7. What do you understand by Central Tendency? 8. Explain the significance of Interpolation in commerce and Industry.
Part'B' Note: Attempt any three questions in maximum 600 words. Each question carries 20 marks
9. Calculate Karl Pearson's measure of coefficient of skewness from the following date: Values Frequency 510 6 1015 8 1520 17 2025 21 2530 15 3035 11 3540 2
10. From the following information calculate coefficient of correlation between age and literacy:
Age group Total Population Literate Population (in years) (00) (00) 1020 1,200 1,100 2030 1,000 925 3040 800 740 4050 500 470 5060 150 140 7080 50 45
11. Determine the percentage number for criminals ubder35 years: Age Percentage of Criminals 025 52.0 2530 15.3 3040 16.8 4045 10.3
12. 1000 plots of agricultural blocks has a standard deviation of 2.7 lbs. Another 500 plots, taken from the same block has a standard deviation of 2.6 lbs. Is the difference between the two standard deviation statistically significant? 13. Distinguish among secular trend, seasonal variation and cyclical fluctuations. How would you measure secular trend in any given data?
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