Suppose you have a random variable that is uniformly distributed between 1 and 29. What is the expected value for this random variable? Answer to one decimal place if necessary.
1 points
QUESTION 4
Suppose you have a random variable that is uniformly distributed between 123 and 167. What is the expected value for this random variable? Answer to one decimal place if necessary.
1 points
QUESTION 5
Suppose you have a random variable that is uniformly distributed between 29 and 76. What is the variance for this random variable? Answer to one decimal place if necessary.
2 points
QUESTION 6
Suppose you have a random variable that is uniformly distributed between 63 and 733. What is the probability of observing a random draw greater than or equal to 278? Answer to three decimal place if necessary.
2 points
QUESTION 7
Suppose you have a random variable that is uniformly distributed between 0 and 2. What is the probability of observing a random draw greater than or equal to 0.19? Answer to three decimal place if necessary.
2 points
QUESTION 8
An Italian restaurant advertises that carryout orders take about 25 minutes. Assume that the time it takes for an order to be ready follows the exponential distribution with a mean of 25. What is the probability that an order will be ready within 19 minutes? Answer to three decimal places if needed.
2 points
QUESTION 9
A Thai restaurant advertises that carryout orders take about 20 minutes. Assume that the time it takes for an order to be ready follows the exponential distribution with a mean of 20. What is the probability that an order will take longer than 28 minutes? Answer to three decimal places if needed.
2 points
QUESTION 10
Suppose that the weight of cereal in a box is normally distributed around a mean of 20, measured in ounces, with a standard deviation of 0.11. What is the z value for a box with 19.85 ounces of cereal? Answer to three decimal places if needed.
2 points
QUESTION 11
Suppose that the weight of cereal in a box is normally distributed around a mean of 15, measured in ounces, with a standard deviation of 0.07. What is the z value for a box with 14.97 ounces of cereal? Answer to three decimal places if needed.
2 points
QUESTION 12
Suppose that the loan amount on mortgages for a particular zip code is normally distributed with a mean of 151,909, measured in dollars, with a standard deviation of 14,597. What is the z value for a loan of 165,046 dollars? Answer to three decimal places if needed.
1 points
QUESTION 13
Suppose that the auto loans from a bank are normally distributed with a mean of $23,334 and a standard deviation of 3,412. What is the probability that a randomly selected loan will be for more than $23,334? Answer to three decimal places if necessary.
1 points
QUESTION 14
Suppose that the auto loans from a bank are normally distributed with a mean of $23,334 and a standard deviation of 3,412. What is the probability that a randomly selected loan will be for more than $25,000? Answer to three decimal places if necessary.
1 points
QUESTION 15
Suppose that the auto loans from a bank are normally distributed with a mean of $23,334 and a standard deviation of 3,412. What is the probability that a randomly selected loan will be for less than $26,000? Answer to three decimal places if necessary.
1 points
QUESTION 16
A uniformly distributed random variable
must be discrete.
must be between 0 and 1.
has the same density for all possible values that the random variable can take on.
has a variance equal to the mean.
1 points
QUESTION 17
The number of cars that a family owns is a continuous variable.
True
False
1 points
QUESTION 18
The total amount a cereal company spends on payroll is a continuous variable.
True
False
1 points
QUESTION 19
The average of 2, 4, 6 is
1
2
3
4
1 points
QUESTION 20
The minimum of 2, 4, 6 is
1
2
3
4
1 points
QUESTION 21
For the exponential distribution the mean and standard deviation are
the same.
unrelated.
related by the square root function.
related by the exponential pdf.
1 points
QUESTION 22
The ________ distribution has the following CDF: 1-exp(-x/μ). Use all lower case letters and double check your spelling.
1 points
QUESTION 23
The exponential distribution is symmetric.
True
False
1 points
QUESTION 24
For the normal distribution the mean and variance are
the same.
unrelated.
related by the square root function.
related by the normal pdf.
1 points
QUESTION 25
The normal distribution is symmetric.
True
False
1 points
QUESTION 26
The uniform distribution is symmetric.
True
False
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