Why is it important to know about linear regression?

For the scatterplot above: Linear or Nonlinear If Linear, is it positive or negative? Estimate the magnitude of the relationship  (small, medium, large, perfect) Estimate the correlation coefficient In your own words, explain the result of the scatterplot

Differentiate linear from nonlinear relationships.

During interrogations of a suspect, direct physical violence was _____ prior to 1930.

Students at Searcy High School were ranked according to their grade standings in mathematics and history. Their ranks are given below:   Student                         Math Rank               History Rank                                                   (X)                                    (Y)             1                                       4                                       7           2                                       6                                       4           3                                       5                                       6           4                                       10                                    8           5                                       8                                       3           6                                       7                                       5           7                                       3                                       9           8                                       9                                       2           9                                       1                                      10           10                                     2                                      1   Calculate the appropriate correlation coefficient. How would you describe the relationship? How confident would you feel about predicting a student’s History Rank given his/her Math rank?

Using the following regression lines…   What is a for line A? What is the relationship for line B? Does A indicate a positive or negative relationship?  

What is an “outlier” and how should it be viewed?

Substantial research now shows that the interviewers in many of the preschool cases ____, and this made the interviewers question children more _____ to confirm their preexisting suspicions. 

The regression line is called the line of “best fit.” Explain.

The Guildford Four case is a good example of: