CORRELATIONAL RESEARCH

2 Questions

:

1.A researcher is interested in the relationship between student school attendance and their academic grades. She asks students to report the number of classes they missed in a semester and their GPA for the same semester.

(4 points)

The correlational coefficient for this relationship was -0.70.

b) Based on the number above, how strong is the relationship between the variables?

c)What is the direction (positive or negative) of the relationship?

d)Based on the direction of this relationship (positive or negative) describe how the two variables decrease or increase in relation to each other.

2.A researcher is interested in a relationship between aggression on schoolyards and video games. She asks parents to fill out a survey that reports the number of hours each week their child plays video games. She then observes each child on the playground at their school and counts the number of aggressive acts (eg. kicking, punching, hair pulling) during 30 minutes of recess time at school.

(4points)

The correlational coefficient for this relationship was +0.6

b) How strong is the relationship between the variables?

c) What is the direction (positive or negative) of the relationship?

d) Based on the direction of this relationship (positive or negative) describe how the two variables decrease or increase in relation to each other.