Indicate what the scatter diagram and probable regression line would look like ...

Indicate what the scatter diagram and probable regression line would look like for two variables that are correlated in each of the following ways. In each instance, assume a negative intercept.
a. -.89
b. +.48
c. -.10 

Research is conducted to determine which recipe of cookie mix is most preferred. Cookie recipe "D" has the highest preference ratings among four cookie mixes tested. This is:
 

a recommendation.
a conclusion.
information that should be included in the front matter.
a method. 

When a researcher is determining if two groups are statistically significant, he or she is considering the two groups as two separate populations and the question is whether or not the two different populations':
z scores are the same.
t scores are the same.
parameters are different.
associations are different