B. FIND #4. MEAN = ___________, #5. MEDIAN = ___________,
#6. VARIANCE =___________, for the following data.
X frequency .
330 15
440 45
550 55
670 25____
C. RANDOM VARIABLE X has a Normal Distribution, N(55, 25).
#7. P(X > 45) = _________
#8. P(50
D. RANDOM VARIABLE Y has a Binomial Distribution, B(8, 0.5).
#9. P(Y
E. RANDOM VARIABLE X has a Binomial Distribution, B(64, 0.5).
#10. Standard deviation of X = __________
#11. Use Normal approximation, P(X > 24) = __________
F. Let P(A) = 0.6, P(B) = 0.7, and P(A or B) = 0.7, then P(A and B) = ___________
G. #12. From a student's’ t-table,
find m such that P(t > m) = 0.05 with sample size is 9. m = __________
H. For events A, B, C, P(A) = 0.3, P(B) = 0.4, and P(C) = 0.5, then
#13. What is the range of P(A or B or C)?Ie, _______ P(A or B or C) _______
I. For some distribution, It is possible that Mean, Mode, and Median are all same.
#14. True ______ , False ______