H4.3 GRADE A Q&A
The _______ is a tool for making predictions about future observed values and is a
useful way of summarizing a linear relationship. - (correct answer)The regression
equation is a tool for making predictions about future observed values. It also provides
one with a useful way of summarizing a linear relationship.
Statisticians often write the word _______ in front of the y-variable in the equation of the
regression line. - (correct answer)Statisticians often write the word "predicted" in front of
the y-variable in the equation of the regression line to emphasize that the line consists
of predictions for the y-variable, not actual values.
Another name for the regression line is the _______ line. - (correct answer)Another
name for the regression line is the least squares line because it is chosen so that the
sum of the squares of the differences between the observed y-value and the value
predicted by the line is as small as possible.
One important use of the regression line is to do which of the following? - (correct
answer)An important use of the regression line is to make predictions about the values
of y for a given x-value.
When writing a regression equation, which of the following is not a name for the x-
variable? - (correct answer)When writing a regression equation, the dependent variable
is not another name for the x-variable. The dependent variable is the y-variable.
The intercept of a regression line tells a person the predicted mean y-value when the x-
value is _______. - (correct answer)The intercept of the regression line tells a person
the predicted mean y-value when the x-value is 0.
the correlation between height and arm span in a sample of adult women was found to
be r equals 0.939. The correlation between arm span and height in a sample of adult
men was found to be r equals 0.856. Which association long dash the association
between height and arm span for women, or the association between height and arm
span for men long dash is stronger? Explain. - (correct answer)The correlation
coefficient is a number that measures the strength of the linear association between two
The _______ is a tool for making predictions about future observed values and is a
useful way of summarizing a linear relationship. - (correct answer)The regression
equation is a tool for making predictions about future observed values. It also provides
one with a useful way of summarizing a linear relationship.
Statisticians often write the word _______ in front of the y-variable in the equation of the
regression line. - (correct answer)Statisticians often write the word "predicted" in front of
the y-variable in the equation of the regression line to emphasize that the line consists
of predictions for the y-variable, not actual values.
Another name for the regression line is the _______ line. - (correct answer)Another
name for the regression line is the least squares line because it is chosen so that the
sum of the squares of the differences between the observed y-value and the value
predicted by the line is as small as possible.
One important use of the regression line is to do which of the following? - (correct
answer)An important use of the regression line is to make predictions about the values
of y for a given x-value.
When writing a regression equation, which of the following is not a name for the x-
variable? - (correct answer)When writing a regression equation, the dependent variable
is not another name for the x-variable. The dependent variable is the y-variable.
The intercept of a regression line tells a person the predicted mean y-value when the x-
value is _______. - (correct answer)The intercept of the regression line tells a person
the predicted mean y-value when the x-value is 0.
the correlation between height and arm span in a sample of adult women was found to
be r equals 0.939. The correlation between arm span and height in a sample of adult
men was found to be r equals 0.856. Which association long dash the association
between height and arm span for women, or the association between height and arm
span for men long dash is stronger? Explain. - (correct answer)The correlation
coefficient is a number that measures the strength of the linear association between two
