The probability distribution of a Poisson random variable provides a good model for data that represent the number of occurrences of a specified event in a given unit of time or space.
Indicate whether the statement is true or false
Q. 2The values below are suggested coefficients of correlation, r. The one that indicates the strongest positive relationship between the input variable x and the output variable y is:
a. 1.2.
b. 0.7.
c. 0.0.
d. 0.8.
Q. 3The Poisson probability distribution is an example of continuous probability distribution.
Indicate whether the statement is true or false
Q. 4The values below are suggested coefficients of correlation, r. The one that indicates the strongest negative relationship between the input variable x and the output variable y is:
a. -1.5.
b. -0.7.
c. 0.0.
d. 0.8.
Q. 5Which of the following statements is true with respect to the binomial distribution?
a. The binomial distribution tends to be more symmetric as the probability of success p approaches 0.5.
b. As the number of trials increase, the expected value of the random variable decreases.
c. As the number of trials increase for a given probability of success, the binomial distribution becomes more skewed.
d. The binomial distribution tends to be more symmetric as the probability of success p approaches 1.0.
e. None of these.
Q. 6The biggest disadvantage of covariance as a measure of linear dependency is that it does not have a standardized unit of measure.
Indicate whether the statement is true or false
Q. 7If the random variable x is binomially distributed with n = 10 and p = .05, then P(x = 2) is:
a. 0.599
b. 0.914
c. 0.074
d. 0.55
e. 1.00
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