ntrigued by a 2013 study at the University of Nebraska, which suggested that mar
ID: 3292457 • Letter: N
Question
ntrigued by a 2013 study at the University of Nebraska, which suggested that marijuana smokers may be thinner than other adults, a group of students did a project to explore the relationship between body mass index (BMI) and amount of time spent under the influence of marijuana (measured in hours per week). Based on a random sample of 33 students at their university, they used BMI as the response variable.
The equation of the least-squares regression line is
Also, r2 = 0.134.
The correlation coefficient for these data is:
–0.134.
–0.366.
0.134.
0.366.
Hours per month under influence = 49.2 – 1.15 BMIExplanation / Answer
r2=0.134
R=sqrt(0.1340
=0.366
plot is not visible.
if given scatter plot negatively correlated variables.
then correlation coefficient= -0.366
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