IQ
2 answers:
Answer:
A: IQ
B: positive
A: y= 0.04x - 0.77
B: positive
A: y=18.8 - 763
A: The SAT versus IQ graph has a slightly stronger association than the GPA versus IQ graph.
D: The SAT versus IQ graph has a slightly stronger association than the GPA versus IQ graph.
Sample Answer: IQ scores and GPAs are positively correlated with a strong relationship. Similarly, IQ and SAT scores are positively correlated with a strong relationship. Because the variable IQ is in both sets, there is likely to be a relationship between the other two variables, GPAs and SAT scores.
126
A: SAT vs. IQ because the data points are closer to the trend line.
C: 3.2
Sample Answer: First, use the equation of the trend line to find the IQ that is expected by the GPA. Next, use the other equation of the trend line to find the SAT that is predicted by the IQ.
Sample Answer: If the trend line of scatterplots for two data sets are compared, the one more likely to provide an accurate prediction is the one with the stronger correlation.
Step-by-step explanation:
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