Which of the following is true about the classical definition of probability? - ANSWERSIf the process that generates the outcomes is known, probabilities can be deducted from theoretical arguments
Which of the following is a continuous random variable? - ANSWERSthe time to complete a specific ta...
Which of the following is true about the classical definition of probability? - ANSWERSIf the process that
generates the outcomes is known, probabilities can be deducted from theoretical arguments
Which of the following is a continuous random variable? - ANSWERSthe time to complete a specific task
The ____ of a random variable corresponds to the notion of the mean, or average, for a sample. -
ANSWERSexpected value
Use the spreadsheet data below to respond to the question
- What is the probability that a respondent is a Female and prefers Math? - ANSWERS3/15 (Just count if
numbers are different)
What is the probability that a respondent is male and prefers Brand2? - ANSWERS0.15 (Brand 2 - Female)
What is the conditional probability that a respondent is female given that she prefers Brand1? -
ANSWERS0.1/0.35 (Brand 1 - Female/Grand Total)
Which statement is NOT true? - ANSWERSAll are true
_____ are mathematical functions used in predictive analytical models which define phenomena that
increase at a specific rate, and is represented by the formula y=ax^b - ANSWERSPower functions
Which of the following is a weighted average of the squared deviations from the expected value? -
ANSWERSvariance
Which of the following is true about probability density functions? - ANSWERSIt calculates the
probability of a random variable lying within a certain interval.
, Which of the following is true of nominal distributions? - ANSWERSThe mean, median, and mode are all
equal
A regression model that involves a single independent variable is called _____ - ANSWERSsimple
regression
Regression models of ______ data focus on predicting the future. - ANSWERStime-series
A linear regression model with more than one independent variable is called a: - ANSWERSmultiple
linear regression
Which of the following is true about linear regression analysis? - ANSWERSIndependent variables can be
ratio or categorical
In regression analysis, which of the following is used to determine whether an independent variable is
significant - ANSWERSP-value
Which of the following is NOT significant? - ANSWERSVariable 4 (P-Value = 0.508477)
To build a regression model which variable do you remove first? - ANSWERSVariable 3 (P-Value =
0.968906)
A(n) _____ is an extreme value that is different from the rest of the data. - ANSWERSoutlier
Which of the following is true when testing for normality of errors? - ANSWERSIt is easier to evaluate
normality with larger sample sizes
In multiple regression, R Square is referred to as the: - ANSWERScoefficient of multiple determination
For a sample linear regression model, significance of regression is: - ANSWERSa hypothesis test of
whether the true regression coefficient B1 is zero
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