Thursday

July 24, 2014

July 24, 2014

Posted by **Jannel** on Sunday, February 1, 2009 at 2:45pm.

Predicted Final Exam Score =

Please explain to me how to do this. My teacher does not teach this kind of stuff in class and he expects us to know this.

- Statistics -
**MathGuru**, Sunday, February 1, 2009 at 7:45pmPre-exam: mean = 275, sd = 26

Final exam: mean = 71, sd = 6

Correlation: r = 0.67

Regression equation is in this format:

predicted y = a + bx

...where a = intercept and b = slope.

To find the equation, you need to substitute the information given in the problem into a workable formula:

predicted y = (rSy/Sx)X - (rSy/Sx)xbar + ybar

...where r = correlation, Sy = sd of y, Sx = sd of x, and X is the variable in 'a + bx' equation.

Note: xbar = mean of x; ybar = mean of y.

I'll let you take it from here. (Once you calculate the predicted y formula, substitute 293 for x in the formula to predict Jane's final exam score.)

**Related Questions**

Statistics - In Professor White’s statistics course the correlation between the ...

statistics - Professor Smith gave a final exam in her history class. The scores ...

statistics - The data below are the final exam scores of 10 randomly selected ...

social studies - The esteemed Dr. Bookworm has just completed a study in which ...

statistics - 5. The table below shows Psychology exam scores, Statistics Exam ...

statistics - Answer the question(s) based on the following situation: 150 ...

statistics - 5. The table below shows Psychology exam scores, Statistics Exam ...

Statistics - 5. Scores on a recent national statistics exam were normally ...

statistics - Ten members of a fraternity take a statistics course. Here are ...

math - An instructor counts homework as 1/3 of the student's grade and the ...