Homework Answers
1.) 50 th percentile is the value corresponding to cumulative frequency just greater than 50N/100 where N is the total frequency which is given to be 50.
So 50x50/100= 25.
Value corresponding to cumulative frequency just greater than 25 is 50th percentile of the data.
Value. Freq. Cumulative freq
1 . 5 5
2 2 7
3 4 11
4 3. 14
5. 2. 16
6. 4. 20
7. 6 . 26
8. 2. 28
9. 2. 30
10. 4. 34
11 . 1 35
12. 6. 41
13 . 2 . 43
14. 3 . 46
15 . 1. 47
16. 3. 50
Cumulative frequency just greater than 25 is 26 and value correspomding to it is 7 , so 50th percentile is 7
Ans . 7
Ques 1.5 ) P(A and B)= P(A) x P(B) = 0.13x0.85 = 0.1105 ( since A and B are independent)
P(A IB)= P( A and B)/ P(B) = 0.13
Ans. 0.13
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