If the occurrence of one event does have an effect on the probability for occurrence of the other event, we say that the two events are mutually exclusive.
Indicate whether the statement is true or false
Q. 2The random variable z is the standard normal score. Find the number k if P(z > k) = 0.9750.
Q. 3Two events are independent if the occurrence (or nonoccurrence) of one gives us no information about the likeliness of occurrence for the other.
Indicate whether the statement is true or false
Q. 4Which of the following statements is false?
a. There is unlimited number of normal probability distributions.
b. There is only one normal probability distribution.
c. Normal probability distributions have two parameters: (mean) and (standard deviation).
d. None of the above.
Q. 5If events A and B are independent, they must be mutually exclusive.
Indicate whether the statement is true or false
Q. 6The area under the normal curve between z = -1.0 and z = -2.0 is
a. 0.3413.
b. 0.1359.
c. 0.4772.
d. 0.0228.
Q. 7If events A and B are not independent, they must be mutually exclusive.
Indicate whether the statement is true or false
Q. 8The area under the normal curve between z = 0.0 and z = 2.0 is
a. 0.9772.
b. 0.7408.
c. 0.1359.
d. 0.4772.
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