MSIS 3223 QUIZ 6- (EXAM 2)
QUESTIONS AND ANSWERS
Probability is the likelihood that an outcome occurs. - Correct Answers -True
The union of two events contains all outcomes that belong to either of the two events. -
Correct Answers -True
Conditional probability is the probability of occurrence of one event 'A' given that
another event 'B' is known to be true or has already occurred. - Correct Answers -True
A probability distribution is the characterization of the possible values that a random
variable may assume along with the probability of assuming these values. - Correct
Answers -True
A random variable is a numerical description of the outcome of an experiment. - Correct
Answers -True
The expected value of a random variable corresponds to the notion of the median for a
sample. - Correct Answers –False
The standard error may be assumed to be large if the data are clustered close to the
regression line. - Correct Answers -False
A good regression model has the fewest number of explanatory variables providing an
adequate interpretation of the dependent variable. - Correct Answers -True
Regression analysis is a tool for building mathematical and statistical models that
characterize relationships between a dependent variable and one or more independent,
or explanatory, variables. - Correct Answers -True
The normal distribution is a continuous distribution that is described by the familiar bell-
shaped curve and is perhaps the most important distribution used in statistics. - Correct
Answers -True
The triangular distribution is defined by three parameters: the mean, median, and mode.
- Correct Answers -False
Higher variance implies low uncertainty. - Correct Answers -False
QUESTIONS AND ANSWERS
Probability is the likelihood that an outcome occurs. - Correct Answers -True
The union of two events contains all outcomes that belong to either of the two events. -
Correct Answers -True
Conditional probability is the probability of occurrence of one event 'A' given that
another event 'B' is known to be true or has already occurred. - Correct Answers -True
A probability distribution is the characterization of the possible values that a random
variable may assume along with the probability of assuming these values. - Correct
Answers -True
A random variable is a numerical description of the outcome of an experiment. - Correct
Answers -True
The expected value of a random variable corresponds to the notion of the median for a
sample. - Correct Answers –False
The standard error may be assumed to be large if the data are clustered close to the
regression line. - Correct Answers -False
A good regression model has the fewest number of explanatory variables providing an
adequate interpretation of the dependent variable. - Correct Answers -True
Regression analysis is a tool for building mathematical and statistical models that
characterize relationships between a dependent variable and one or more independent,
or explanatory, variables. - Correct Answers -True
The normal distribution is a continuous distribution that is described by the familiar bell-
shaped curve and is perhaps the most important distribution used in statistics. - Correct
Answers -True
The triangular distribution is defined by three parameters: the mean, median, and mode.
- Correct Answers -False
Higher variance implies low uncertainty. - Correct Answers -False
