The percentages of college freshmen whose average grade in high school was an A are shown in
Question:
Let p be the percentage of college freshmen whose average grade in high school was an A at t years since 1970.
a. Construct a scatterplot.
b. Describe the four characteristics of the association. Compute and interpret r as part of your analysis.
c. A model of the situation is p = 0.76t + 18.06. Graph the model on the scatterplot. Does it come close to the data points?
d. Estimate when 44% of all college freshmen earned an average grade of A in high school.
e. Describe at least two possible lurking variables.
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