QUESTION # 1

Determine whether this table represents a probability distribution.

x	P(x)
0	0.05
1	0.3
2	0.3
3	0.4

• Yes, it is a probability distribution
• No, it is not a probability distribution

ANSWER:

QUESTION # 2

x	P(x)
0	0.3
1	0.3
2	0.3
3	0.1

Find the mean of this probability distribution. Round your answer to one decimal place.

ANSWER:

QUESTION # 3

x	P(x)
0	0.2
1	0.05
2	0.2
3	0.55

Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places

ANSWER:

QUESTION # 4

Complete the following probability distribution table:

X	P(X)
-19	0.13
25	0.17
50	0.17
63	0.22
75
85	0.22

ANSWER:

QUESTION # 5

x	P(x)
2	0.2
6	0.1
8	0.15
12	0.55

Find the mean and standard deviation of this probability distribution.

Give your answer to at least 2 decimal places.

Mean:

Standard Deviation:

QUESTION # 6

A fair coin is flipped 13 times. Find the probability that more than 4 of the flips turn up tails.

• 0.895524
• 0.866577
• 0.832615
• 0.881664
• 0.772052
• 0.850234

ANSWER:

QUESTION #7

Construct a Binomial probability distribution table usingn=5andp=0.31. Next, record the mean and standard deviation of the distribution below. Where necessary, round all numbers to four decimal places.

xx	P(x)P(x)
?	?
?	?
?	?
?	?
?	?
?	?

mean = = standard deviation = =

QUESTION # 8

According to the American Red Cross, 11.4% of all Connecticut residents have Type B blood. A random sample of 15 Connecticut residents is taken. X=X=the number of CT residents that have Type B blood, of the 15 sampled. What is the expected value of the random variableXX?

A.) 1.71 B.) 1.215

C.) 1.785

D.) 1.395

E.) 1.77

F.) 1.605

ANSWER:

QUESTION # 9

According to the American Red Cross, 10% of all Connecticut residents have Type B blood. A random sample of 20 Connecticut residents is taken. X=X=the number of CT residents that have Type B blood, of the 20 sampled. What is the standard deviation of the random variableXX?

• 1.57208
• 1.87950
• 1.53888
• 1.52222
• 1.80000
• 2.09678

ANSWER:

QUESTION # 10

A high school baseball player has a0.1590.159batting average. In one game, he gets99at bats. What is the probability he will getat least77hits in the game?

ANSWER:

QUESTION # 11

A fair coin comes up 'heads' 50% of the time. If we toss such a coin twelve times in a row, what is the probability thatless thanthree of those tosses are 'heads'? ANSWER: % Enter your answer as a percentage correctly rounded to one decimal place. You do not need to include the % sign.