Statistics BTM8104 Week 5

Question Details: #760
Statistics BTM8104 Week 5

Section 4: Correlation, Predication, Confidence, and Errors

This section examines correlation, estimating confidence, and margin of errors. Correlation is an important concept to understand, since often what is found in many areas of research is not cause, but a relationship that exists among variables. In chapter seven you will come to understand the importance of what correlation is and what it is not. You will also be introduced to prediction through some introductory regression analysis. This is important for anticipating results in research, and in many other areas of life.

Chapter eight explores confidence intervals and margins of error, and how to apply these statistics to measurements. No measurement is perfect. Therefore it becomes imperative that individuals understand that what is found in samples are not exact duplications of what is found in the population. However, we need to know how confident we are in the posted results, how close they are to those found in the population, and how much error we think is statistically possible in our results.

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Solution Details: #771
Statistics - BTM8104-Week 5

Chapter Seven

Problem 1) Look at the scatter plot below.  Does it demonstrate a positive or negative correlation?Why? 

Is there any outliers?What are they?

This scatter plot demonstrates a positive correlation, both variables increases.

There is one outlier at points (6, 22)

 

Problem 2) Look at the scatter plot below.  Does it demonstrate a positive or negative correlation?  Why? 

Is there any outliers?  What are they? 

This scatter plot demonstrates a negative correlation, both variables ...

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