Question

- What is logistic regression? When should we use logistic regression instead of linear regression?
- Why cannot we use linear regression where logistic regression is used? Provide the generalized multiple logistic regression equation.

Answer #1

why should we remove non-significant variables from multiple
linear regression models? What problems may arise if we keep them
in the model?

What is the logic behind the ANOVA analysis? When and why should
we use it instead of the T-tests that seem to be much easier to
do?
(Question is related to lean six sigma)

In the multiple linear regression model with estimation by
ordinary least squares, why should we make an analysis of the
scatter plot between each covariable xij, j = 1, 2,. . . ,p with
the residues ei?

So, as we look at Linear Regression and correlation this week,
please find provide an example of how and when linear regression is
used.

What types of predictor variables are acceptable to use in a
logistic regression model?
Only quantitative predictor variables are acceptable to use as
predictor variables in logistic regression models
Only dummy variables are acceptable to use as predictor
variables in logistic regression models
Both quantitative and dummy variables are acceptable to use as
predictor variables in logistic regression models

What statistical assumptions must be met to use logistic
regression?

When finding the regression line, why would we minimize the squared
error instead of the mean squared error? Would minimizing the root
mean square have given us a different/better answer?

When comparing more than two treatment means, why should you use
an analysis of variance instead of using multiple
ttests?

For each of the following research questions, determine whether
correlation, linear
regression, multiple regression, or logistic regression is best
suited to answer it.
What is the strength of the relationship between the speed with
which a runner
completes a one mile run and their resting heart rate?
What percent of the variation in resting heart rate is explained
by the speed with
which a runner completes a one mile run?
What percent of the variation in resting heart rate is...

When is it appropriate to use linear regression?

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