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MSIS 3223 - Nord - Okstate - Exam 2
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MSIS 3223 - Nord - Okstate - Exam 2
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MSIS 3223 - Nord - Okstate - Exam2
What is the probability that a respondent is male and prefers arts? - -2/15
- which of the following is the weighted average of the squared deviations
from the expected value? - -variance
- which of the following is a continuous random variable? - -number of
students in class
- which of the following is true about probability density functions? - -it
calculates the probability of a random variable lying within a certain interval
- which of the following is true of normal distributions? - -mean, median,
and mode are all equal
- which of the following is true about the classical definition of probability? -
-if the process that generates the outcomes is known, probabilities can be
deduced from theoretical arguments.
- the _______ of a random variable corresponds to the notion of the mean, or
average, of a sample. - -expected value
- A regression model that involves a single independent variable is called... -
-simple regression
- regression models of _________ data focus on predicting the future - -time
series
- Which of the following is true of linear functions used in predictive
analytical models? - -it is used when there is a steady decrease or increase
over a range of a variable
- In modeling relationships and trends, which one is used for cross-sectional
data? - -Scatter chart
- In Excel's trendline tool, the value of the ______ gives the measure of fit of
the line to the data. - -R-squared
- Which of the following is true about the observed errors associated with
estimating the value of the dependent variable using the regression line? - -
the errors can be negative or positive
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