RES342 Week 4 DQs - StudentOfFortune.com

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Karla3333
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$15.00 RES342 Week 4 DQs

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Due on Oct. 30, 2009
Asked on Oct. 27, 2009 at 08:47:08AM

Q:

DQ1
Does correlation equal causation?

Does the strength of correlation depend on the direction?

What is the meaning of a zero correlation? Explain your answers.

DQ2
What terms describe the fit of a regression equation to the data?

What is the importance of the coefficient of determination (r²)?

How do you identify outliers in your data?

How do they impact your regression equation?

DQ3
What are the requirements that must be met for a regression analysis?

What happens if these requirements are violated?

Why is analysis of residuals important?

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JillatUniversityofPh
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$15.00 Answers explained in full with references

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Posted on Oct. 27, 2009 at 08:52:14AM

A:
Preview: ... relation does not equal causation, in fact most statistical tests cannot establish causation. Correlation can only show the strength of one variable's association with another. Strength and direction are not necessarily proportional. Correlation takes on values from -1 to 1. A correlation coefficient with absolute value close to 1 implies a strong ...

The full tutorial is about 269 words long .

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$5.00 DQ1 Does correlation equal causation? Does the strength of correlation depend on the direction? What is the meaning of

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Posted on Oct. 27, 2009 at 09:29:45AM

A:
Preview: ... The independent variable (also know as the predictor variable) is a fixed, often easily observed variable which the researcher wants to use to predict values of the dependent variable (also known as the response variable). The regression model only shows correlation. As discussed above, correlation does not imply causation. What are the requirements that must ...

The full tutorial is about 306 words long .