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12 Cards in this Set

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Which of the following is not one of the basic approaches to probability?

A) Priori approach

B) Null Approach

C). Emperical classical approach
B) null aproach
The event that includes all of events that are not found in "Event A" is called
Complement of A

(A joint event is an event that has to or more characteristics)
Which of the following is not a true statement about the binomial probablity distribution?

A) Each outcome is independent of each other

B). The random variable of interest is continous

C) The probability of success must be constant from trial to trial
B) The random variable of interest is continuous
Whenever p = 0.5, the shape of a given binomial distribution will be...
symmmetric
If the outcomes of a discrete random variable follow a Poisson distribution, then their...

A) mean equals

B) mean equals the variance

C) median equals the variance
B) mean equals the variance
The number of arrivals of delivery trucks per hour at a loading station is an eample of which of the following processes

A) Poisson

B) Binomial
A) Poisson

(Binomail distribution is one of the most useful mathematical models. you use the binomal distribution when the discrete variable for interest is the number of successes in a sample of n observations
Which of the following is NOT a property of the normal distribution

A) it is bell shaped

B) its measure of central tendency are all identical

C) It is slightly skewed to the left
C) It is slightly skewed to the left
Which of the following about the normal distribution is NOT true?

A) Theoretically, the mean median, and mode are the same

B)It is a discrete probablity distribution

C) About two-thirds of the observations fall within +- 1 standard deviation
B) It is a discrete probability distribution
As the sample size increases, the standard error of the mean:...
decreases
If a sample of n=100 is taken from a population whose standard deviation is equal to 100, then the standard error of the mean equals.

A) 100

B) 10
B) 10
The standard deviation of the sampling distribution of the mean is called the...
standard error of the mean
according to the central limit theorm, the sampling distribution of the mean can be approximated by the normal distribution...

A) as the sample size (number of observations) gets "largee enough"

B)as the number of samples get "large enough"
(A) as the sample size (number of observations) gets "large enough"