MSIS 3223 ACTUAL EXAM 2026 QUESTIONS
WITH ANSWERS GRADED A+
◉ Which of the following is true of normal distributions? Answer: The
mean, median, and mode are all equal.
◉ Probability is the likelihood that an outcome occurs. Answer: True
◉ The union of two events contains all outcomes that belong to either of
the two events. Answer: 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. Answer: 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. Answer: True
◉ A random variable is a numerical description of the outcome of an
experiment. Answer: True
, ◉ The expected value of a random variable corresponds to the notion of
the median for a sample. Answer: False
◉ 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. Answer: True
◉ The triangular distribution is defined by three parameters: the mean,
median, and mode. Answer: False
◉ Higher variance implies low uncertainty. Answer: False
◉ Variance calculates the probability of a random variable lying within a
certain interval. Answer: True
◉ Regression models of ______ data focus on predicting the future.
Answer: time-series
◉ 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. Answer: True
◉ In predictive analysis models, a second-order polynomial has only
one hill or valley. Answer: True
WITH ANSWERS GRADED A+
◉ Which of the following is true of normal distributions? Answer: The
mean, median, and mode are all equal.
◉ Probability is the likelihood that an outcome occurs. Answer: True
◉ The union of two events contains all outcomes that belong to either of
the two events. Answer: 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. Answer: 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. Answer: True
◉ A random variable is a numerical description of the outcome of an
experiment. Answer: True
, ◉ The expected value of a random variable corresponds to the notion of
the median for a sample. Answer: False
◉ 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. Answer: True
◉ The triangular distribution is defined by three parameters: the mean,
median, and mode. Answer: False
◉ Higher variance implies low uncertainty. Answer: False
◉ Variance calculates the probability of a random variable lying within a
certain interval. Answer: True
◉ Regression models of ______ data focus on predicting the future.
Answer: time-series
◉ 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. Answer: True
◉ In predictive analysis models, a second-order polynomial has only
one hill or valley. Answer: True
