please explain these,

1) What does the variable represent?

The population correlation coefficient

The coefficient of determination

The critical value for the correlation coefficient

The sample correlation coefficient

2) A baseball player wants to determine if the type of bat he uses each year can be used to predict the amount of improvement in his game. Which variable would be the response variable?

The type of bat

The improvement in his game

The number of times he bats

The baseball player

3) Two variables have a negative linear correlation. Is the slope of the regression line between these two variables positive or negative?

Negative. As one variable increases, so does the other

Negative. As one variable increases, the other decreases

Positive. As one variable increases, the other decreases

Positive. As one variable increases, so does the other

4) A value of the y-intercept of the regression line would be given the notation of:

r2

r

b

m

5) What would be the notation for the mean of the x values?

b

xi

x

(x, y)