1. INTERNATIONAL UNIVERSITY OF BUSINESS AGRICULTURE AND TECHNOLOGY
First term examination STA 240
Full marks: 100 (10x10) Time: 50 minutes
1. For the following table, construct a line graph:
Months Aug Sep Oct Nov Dec
Share index 200 350 400 150 50
2. Find the mean for the series 1000, 2000, 3000, …………, 50000.
3. Find the two numbers whose HM=32/5 and GM=8.
4. Find CV of two numbers 5 and 3.
5. Find CV for the series 1, 2, 3, ………… , 10.
6. If SD of 1st n natural numbers is √10, what will be the mean?
7. Find MD and SD of the numbers 0, 1, 2.
8. For any two numbers, GM=√7 and SD=3.
a) Find the numbers. b) Find HM.
c) Find variance. d) Find AM.
e) Find median. f) Find CV.
9. Construct a steam & leaf plot for the following data:
11,14,16,21,23,24,27,30,31,35,36,37,38,40,41,42,43,50,51
10. What is the median of the sample 4,5,7,9,6,3,2, 5, 1, 9, 8, 5, 8?

2. Md. Mortuza Ahmmed