2A) Suppose you found a correlation coefficient of r = +1.23 between “grade on a test” and “amount of sleep the night before”. How would you describe this relationship? 2B) Would it generally be preferable to have a correlation coefficient of r = +.52 as opposed to r = -.52? 2C) If the correlation coefficient between “number of minutes studied” and “ test grade” is r = -.64, what is the coefficient of determination? 2D) What is the coefficient of determination telling you about the relationship between these two variables (in 2C)? 2E) If you suspect that anxiety underlies an apparent correlation between “fidgeting” and “stuttering”, what procedure might you use to determine if your suspicion is correct? (A description of the procedure is not necessary).
2A) Suppose you found a correlation coefficient of r = +1.23 between “grade on a test” and “amount of sleep the night before”. How would you describe this relationship? 2B) Would it generally be preferable to have a correlation coefficient of r = +.52 as opposed to r = -.52? 2C) If the correlation coefficient between “number of minutes studied” and “ test grade” is r = -.64, what is the coefficient of determination? 2D) What is the coefficient of determination telling you about the relationship between these two variables (in 2C)? 2E) If you suspect that anxiety underlies an apparent correlation between “fidgeting” and “stuttering”, what procedure might you use to determine if your suspicion is correct? (A description of the procedure is not necessary).
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