1. If the correlation coefficient of the relationship between X and Y is negativ
ID: 3320417 • Letter: 1
Question
1. If the correlation coefficient of the relationship between X and Y is negative 0.8, this should be interpreted as saying that X and Y
a. Move relative to each other randomly
b. Are not strongly correlated
c. Predictably move in opposite directions to each other
d. Are not correlated
2. A regression equation that has one or more squared X variables is called a/an
a. Complete regression model
b. Quadratic regression model
c. Pearson regression model
d. Interactive regression model
3. In a regression of student heights in inches with a dummy variable for gender (X1) where female is 0 and male is 1, the resulting equation was Height = 66 + 5X1. The p-value for B1 (or the 5) is .01and the R2 is .60. Which of the following is NOT a correct interpretation of the results?
a. The value 5 is significant if alpha is .05
b. The average height of males is 71 inches
c. The average height of all students is 68.5 inches
d. The average height of females is 66 inches
Explanation / Answer
Q1). Option C is Correct. Predictably move in opposite directions to each other
Q2) Option B is Correct.Quadratic regression model
Q3) Option A is Correct. The value 5 is significant if alpha is .05.
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