7.2 PART 3

18. Evaluate 8C5

210____

96_____

120___

56____

19. Find the expected value if the values of x are 0, 1, 2, and 3; with corresponding frequencies of 0.1, 0.4, 0.4 and 0.1.

1.25____

1.0____

1.5____

2.1___

20. Find the area under the normal curve to the right of z = 1.35.

0.9115____

0.0059____

0.8230____

0.0885____

21. Use the table or binomial formula to find the probability when n = 5, x = 1, p = 0.40.

0.621___

0.314____

0.135____

0.259____

22. Use the Poisson table or formula to find the probability when x = 6, = 5.5.

0.354______0.157____ 0.666_____ 0.686_____

23. Let x be a binomial random variable with n = 8, p = 0.6. Find the mean.

5.1____

3.6_____

3.3_____

4.8_____

24. Let x be a binomial random variable with n = 10, p = 0.4. Find the standard deviation.

1.73___

1.55___

1.44____

2.4____

25. Let x be a binomial random variable with n = 8, x = 6 and p = 0.55; Find P (2) using the binomial formula.

0.35_____

0.16_____

0.56_____

0.39_____