QMB 2100 Midterm Exam Questions
With Correct Answers
The probability of a particular event occurring, given that another event has
| | | | | | | | | | | |
occurred, is known as a(n) - CORRECT ANSWER✔✔-conditional probability
| | | | | | | |
T OR F: To apply the special rule of addition, the events must be mutually
| | | | | | | | | | | | | | |
exclusive - CORRECT ANSWER✔✔-true
| | |
T OR F: A combination of a set of objects is defined by the order of the objects -
| | | | | | | | | | | | | | | | | | |
CORRECT ANSWER✔✔-false |
A joint probability measures the likelihood that two or more events will happen
| | | | | | | | | | | | |
concurrently - CORRECT ANSWER✔✔-true | | |
To construct a binomial distribution, it is necessary to know the total number of
| | | | | | | | | | | | | |
trials and the probability of success on each trial - CORRECT ANSWER✔✔-true
| | | | | | | | | | |
The variance of a probability distribution is based on the sum of squared
| | | | | | | | | | | | |
differences from the mean multiplied by the probability of X. - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-true
When sampling is done without replacement from a finite population and the
| | | | | | | | | | | |
outcomes are measured as either a success or failure, the hypergeometric
| | | | | | | | | | |
distribution should be applied - CORRECT ANSWER✔✔-true
| | | | | |
, Nonstop Airlines determined that the mean number of passengers per flight is
| | | | | | | | | | | |
152 with a standard deviation of 10 passengers. Practically all flights have
| | | | | | | | | | | |
between 142 and 162 passengers. - CORRECT ANSWER✔✔-false
| | | | | | |
For a uniformly distributed random variable, x, P(x) is constant - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-true
The z-scores for X values greater than the mean are negative - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-false
Some normal probability distributions are positively skewed - CORRECT
| | | | | | | | |
ANSWER✔✔-false
Which approach to probability assumes that equal events are equally likely? -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-Classical |
A graphical method used to calculate joint and conditional probabilities is
| | | | | | | | | | |
______________________. - CORRECT ANSWER✔✔-a tree diagram | | | | |
A method of assigning probabilities based upon judgement, opinions, and
| | | | | | | | | |
available information is referred to as the ________________. - CORRECT
| | | | | | | | | |
ANSWER✔✔-subjective method |
The probability of two or more events occurring concurrently is called a(n) -
| | | | | | | | | | | | |
CORRECT ANSWER✔✔-joint probability
| |
With Correct Answers
The probability of a particular event occurring, given that another event has
| | | | | | | | | | | |
occurred, is known as a(n) - CORRECT ANSWER✔✔-conditional probability
| | | | | | | |
T OR F: To apply the special rule of addition, the events must be mutually
| | | | | | | | | | | | | | |
exclusive - CORRECT ANSWER✔✔-true
| | |
T OR F: A combination of a set of objects is defined by the order of the objects -
| | | | | | | | | | | | | | | | | | |
CORRECT ANSWER✔✔-false |
A joint probability measures the likelihood that two or more events will happen
| | | | | | | | | | | | |
concurrently - CORRECT ANSWER✔✔-true | | |
To construct a binomial distribution, it is necessary to know the total number of
| | | | | | | | | | | | | |
trials and the probability of success on each trial - CORRECT ANSWER✔✔-true
| | | | | | | | | | |
The variance of a probability distribution is based on the sum of squared
| | | | | | | | | | | | |
differences from the mean multiplied by the probability of X. - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-true
When sampling is done without replacement from a finite population and the
| | | | | | | | | | | |
outcomes are measured as either a success or failure, the hypergeometric
| | | | | | | | | | |
distribution should be applied - CORRECT ANSWER✔✔-true
| | | | | |
, Nonstop Airlines determined that the mean number of passengers per flight is
| | | | | | | | | | | |
152 with a standard deviation of 10 passengers. Practically all flights have
| | | | | | | | | | | |
between 142 and 162 passengers. - CORRECT ANSWER✔✔-false
| | | | | | |
For a uniformly distributed random variable, x, P(x) is constant - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-true
The z-scores for X values greater than the mean are negative - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-false
Some normal probability distributions are positively skewed - CORRECT
| | | | | | | | |
ANSWER✔✔-false
Which approach to probability assumes that equal events are equally likely? -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-Classical |
A graphical method used to calculate joint and conditional probabilities is
| | | | | | | | | | |
______________________. - CORRECT ANSWER✔✔-a tree diagram | | | | |
A method of assigning probabilities based upon judgement, opinions, and
| | | | | | | | | |
available information is referred to as the ________________. - CORRECT
| | | | | | | | | |
ANSWER✔✔-subjective method |
The probability of two or more events occurring concurrently is called a(n) -
| | | | | | | | | | | | |
CORRECT ANSWER✔✔-joint probability
| |
