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JulijaS [17]
3 years ago
15

A least squares regression line was created to predict the Exam 3 score of STA 2023 students based on their Exam 1 score. The st

udy found that the value of R-squared was 28.8% and the least squares regression line was yhat=50.57+0.4845x. What is the correlation coefficient, r?a. 0.54b. -0.54c. 5.37d. -5.37e. 0.08f. -0.08
Mathematics
1 answer:
masya89 [10]3 years ago
6 0

Answer:

a) 0.54

Step-by-step explanation:

The correlation coefficient can be found by taking square root of R-squared value and the sign of correlation coefficient can be assessed by considering the sign of slope value. So,

r²=28.8%=28.8/100=0.288

r=\sqrt{r^{2} }=\sqrt{0.288}=0.5367

By rounding to two decimal places the correlation coefficient

r=0.54

We can see that slope=0.4845 has positive sign so, the correlation coefficient contains the positive sign.

Hence the correlation coefficient r=0.54.

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Answer:Your calculator should now display a screen with these variables. I have written what each

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N Number of payments

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Calculator steps: Hit APPS button then select Finance then select TVM solver.

We will solve most of the problems in this chapter from this screen. We need to know what

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Step-by-step explanation:

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