RETURN THE QUESTION PAPER ALONG WITH THE ANSWER SCRIPT AFTER THE                             EXAM.        ID              ...
12.    Why we study coefficient of variation (CV)?             (3)13.    Write down the properties of Normal distribution....
RETURN THE QUESTION PAPER ALONG WITH THE ANSWER SCRIPT AFTER THE                             EXAM.
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  1. 1. RETURN THE QUESTION PAPER ALONG WITH THE ANSWER SCRIPT AFTER THE EXAM. ID NAME MARKS IUBAT–INTERNATIONAL UNIVERSITY OF BUSINESS AGRICULTURE AND TECHNOLOGY Final examination STA 240 Full marks: 100 Time: 3 hours 1. Which measure of central tendency is the best? Why? (3) 2. Find the mean and mode for the series 1, 2, 3 ……… 700. (5) 3. Two dice are rolled; find the probability that the sum is equal to 7. (10) 4. Find the two numbers whose AM=10 and GM=8. (10) 5. Which measure of dispersion is the best? Why? (3) 6. Find the MD and SD of the numbers 1, 2,3,4,5. (10) You may use the following formulas n Xi X SD MD i 1 n 7. In what situations, HM and GM are not applicable? (3) 8. Find the two numbers whose AM=7 and SD=1. (10) 9. Write down the applications of Poisson distribution. (3) 10. Explain the concept of systematic sampling with an example. (3) 11. f(x)=x5 ; 0<x<1 (10) a) Find E(X). b) Find V(X).
  2. 2. 12. Why we study coefficient of variation (CV)? (3)13. Write down the properties of Normal distribution. (3)14. Let X=fertilizer, Y=production of rice. (10) X: 1 2 3 Y: 4 5 6 a) Find the correlation coefficient, r. b) Fit a regression line between X and Y. You may use the following formulas15. Let code the following values as (10) Dhaka (1), Khulna (2), Chittagong (3), others (4): 124213421312134313432324134231432312324 a) Construct a frequency table for the given data. b) Construct relative frequency column in that table. c) Construct percentage column in that table.16. Define the following terms: (4) a) Null hypothesis b) Critical region c) Type I error d) Two sided test.
  3. 3. RETURN THE QUESTION PAPER ALONG WITH THE ANSWER SCRIPT AFTER THE EXAM.

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