A marketing survey compiled data on the number of personal computers in households. If X = the number of computers in a randomly-selected household, and we omit the rare cases of more than 5 computers, then X has the given distribution. The expected value of X is E(X) =
AP Statistics Chapter 13 Experiments

Quiz
•
Mathematics
•
12th Grade
•
Hard
Anthony Clark
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
0.40
1.00
1.45
1.66
2.50
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A marketing survey compiled data on the number of personal computers in households. If X = the number of computers in a randomly-selected household, and we omit the rare cases of more than 5 computers, then X has the given distribution. The standard deviation of X is 1.27. Interpret this value.
The number of computers in a randomly selected household is within 1.27 of the mean.
The number of computers in a randomly selected household is exactly 1.27 from the mean.
The number of computers in a randomly selected household is 1.27, on average.
The number of computers in a randomly selected household is typically 1.27 from the mean.
The average number of computers in a randomly selected household is typically 1.27 from the mean.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A marketing survey compiled data on the number of personal computers in households. X = the number of computers in a randomly-selected household. If you were to randomly select households, what is the probability it would take exactly 8 selections to find one with 5 computers?
Approximately 0
0.02
0.03
0.32
Approximately 1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The number of DVDs rented daily at DVD rental machine has a mean of 134 with a standard deviation of 32. Select two days at random and find the difference in the number of DVDs rented on the two days. What are the mean and standard deviation of the difference in the number of DVDs rented?
Mean = 0, Standard Deviation = 0
Mean = 0, Standard Deviation = 64
Mean = 0, Standard Deviation = 45
Mean = 92, Standard Deviation = 32
Mean = 134, Standard Deviation = 32
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Seventeen people have been exposed to a particular disease. Each one independently has a 40% chance of contracting the disease. A hospital has the capacity to handle 10 cases of the disease. What is the probability that the hospital’s capacity will be exceeded?
0.011
0.965
0.035
0.989
0.092
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In which of the following situations would it be appropriate to use a Normal distribution to approximate probabilities for a binomial distribution with the given values of n and p?
n = 10, p = 0.5
n = 40, p = 0.88
n = 100, p = 0.2
n = 100, p = 0.99
n = 1000, p = 0.003
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7
A
B
C
D
E
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