ISYE 6414 - All Units Exam Practice Questions and Answers |100% Pass
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Course
ISYE 6414
Institution
ISYE 6414
ISYE 6414 - All Units Exam Practice
Questions and Answers |100% Pass
response (dependent) variables - Answer-one particular variable that we are interested in
understanding or modeling (y)
predicting or explanatory (independent) variables - Answer-a set of other variables that might be
useful ...
What can we use to test for statistical significance? - Answer✔✔-t-test
What would we do if the T value is large? - Answer✔✔-Reject the null hypothesis that β1 is equal to
zero. If the null hypothesis is rejected, we interpret this that β1 is statistically significant.
what does 'statistical significance' mean? - Answer✔✔-B1 is statistically different from zero.
what is the distribution of B1? - Answer✔✔-Normal
The estimators for the regression coefficients are:
A) Biased but with small variance
B) Unbiased under normality assumptions but biased otherwise.
C) Unbiased regardless of the distribution of the data. - Answer✔✔-C
The assumption of normality:
A) It is needed for deriving the estimators of the regression coefficients.
B) It is not needed for linear regression modeling and inference.
C) It is needed for the sampling distribution of the estimators of the regression coefficients and hence for
inference.
D) It is needed for deriving the expectation and variance of the estimators of the regression coefficients.
- Answer✔✔-C
What is 'X*'? - Answer✔✔-predictor
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