TAMU admissions board believes the score you get on the SAT in high school can help predict your college GPA. Below is a regression model using the SAT scores and GPA for 83 college graduates. Calculate a 70% Confidence Interval for the slope of the regression line. Use 4 decimal places. (Note: The SAT scores have been divided by 100 just to make the numbers nicer)

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TAMU admissions board believes the score you get on the SAT in high school can help predict your college GPA. Below is a regression model using the SAT scores and GPA for 83 college graduates. Calculate a 70% Confidence Interval for the slope of the regression line. Use 4 decimal places.

(Note: The SAT scores have been divided by 100 just to make the numbers nicer)

    

Simple linear regression results:
Dependent Variable: GPA
Independent Variable: SAT/100
GPA = 1.318967 + 0.174653 [SAT/100]
Sample size: 83
R (correlation coefficient) = 0.1487
R-sq = 0.0221
Estimate of error standard deviation: 0.118302


Parameter estimates:

Parameter Estimate Std. Err. DF T-Stat P-Value
Intercept 1.318967 0.3631 81 3.633 0.00049
Slope 0.174653 0.129086 81 1.353 0.1798



Use 4 decimal places 

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