Question

1) Using the binomial distribution, answer the following question. In the Southwest, 5% of all cell phone calls are dropped. What is the probability that out of six randomly selected called, exactly one will be dropped?

Group of answer choices

0

.393

.232

.001

2) Consider the following probability distribution below and calculate the expected value of x.

x f(x)

10	.20
20	.30
30	.40
40	.05
50	.05

Group of answer choices

150

35

24.5

30

3) Using the binomial distribution, answer the following question. In the Southwest, 5% of all cell phone calls are dropped. What is the probability that out of six randomly selected called, exactly one will be dropped?

Group of answer choices

0

.393

.232

.001

4) If the variance of a uniform discrete probability distribution is 2.7644, what is the standard deviation?

Group of answer choices

1.6626

2.7644

1

1.3522

Answer 1

Part 1)

X ~ B ( n = 6 , P = 0.05 )

Part 2)

X	P ( X )	X2	X * P(X)
10	0.2	100	2
20	0.3	400	6
30	0.4	900	12
40	0.05	1600	2
50	0.05	2500	2.5
Total	1	5500	24.5

Mean = 24.5

Part 3)

X ~ B ( n = 6 , P = 0.05 )

Part 4)

Variance  

Standard deviation