In a study of gender typing of toys, fathers and mothers were asked to rate the gender appropriateness of toys on a scale of 1 (Definitely for girls) to 5 (Definitely for boys). The investigators did a regression analysis of the fathers' mean ratings vs. the mothers mean ratings for each toy. A computer-generated normal probability plot of the residuals is shown below. 
Write a brief paragraph describing the plot. Based on your description recommend to the investigators whether or not the appropriate assumption is met for simple linear regression.
Definitions:
Awards
Recognitions or prizes given for achievement, excellence, or performance in a particular field or discipline.
Positive Reinforcement
An increase in future behavior due to the addition of a stimulus immediately following a response.
Good Grades
Academic scores or evaluations indicating a high level of competence or mastery in the subject matter being assessed.
Primary Reinforcer
An innately satisfying stimulus, such as food or drink, which does not require learning to become pleasurable.
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