First Semester BCA Degree Examinations BCA 103 PROBABILITY &STATISTICS (2007 Admission onwards)mg university

Time : 3 hrs Marks: 75

                                             PART A

(Answer any Ten questions, Each question carries 3 marks) )

1. What is primary data?
2. Define Simple Random Sampling.
3. Define Pie-Diagram.
4. What is Coefficient of variation.
5. Define random experiment.
6. What is conditional Probability.
7. Define correlation.
8. What is regression Coefficient.
9. What is trend.
10. Define seasonal variation.
11. Define Median
12. What is Histogram

                                        PART B

( Answer all questions, Each question carries 9 marks)

13. Explain different methods of sampling
OR
14. What are the different methods of collecting data?
15. Draw ogive for the following data
Class: 0-10 10-20 20-30 30-40 40-50
Frequency: 5 7 13 8 3
OR
16. Find Mean, Median and Mode
Class: 0-9 10-19 20-29 30-39
Frequency: 5 10 15 5
17. State & Prove Bayes theorem
OR
18. A problem in statistics is given to 3 students Their chances of solving this
problem are 1/3,2/3, 1/3 respectively what is the probability that the problem
will be solved.

19. Find rank, Correlation Coefficient
X : 22 25 18 25 26 22
Y :28 29 25 28 29 30
OR
20. Find regression lines
X: 1 3 5 7 9
Y: 2 4 6 8 10
21. Explain different components of time series
OR
22. Find trend line equation & trend values
Year: 1990 91 92 93 94 95
Values: 50 52 48 55 57 60