Which of the following is true about the standard error of estimate?
A) It is a measure of the accuracy of the prediction
B) It is based on squared vertical deviations between Y and Y
C) It cannot be
Based on the regression equation, we can
A) predict the value of the dependent variable given a value of the independent variable.
B) predict the value of the independent variable given a value of the
A committee studying employer-employee relations proposed that each employee would rate
his or her immediate supervisor and in turn the supervisor would rate each employee. To find
reactions regarding
Suppose a package delivery company purchased 14 trucks at the same time. Five trucks were
purchased from manufacturer A, four from B and five from manufacturer C. The cost of
maintaining each truck wa
The regression analysis can be summarized as follows:
A) No significant relationship between the variables
B) A significant negative relationship exists between the variables
C) A significant positive
Chapter 14
Multiple Regression and Correlation Analysis
True/False
1. Multiple regression analysis is used when two or more independent variables are used to
predict a value of a single dependent vari
If an ANOVA test is conducted and the null hypothesis is rejected, what does this indicate?
A) Too many degrees of freedom
B) No difference between the population means
C) A difference between at leas
Chapter 14
Multiple Regression and Correlation Analysis
True/False
1. Multiple regression analysis is used when two or more independent variables are used to
predict a value of a single dependent vari
What are the input and the output of linear regression?
Answer: As an input, linear regression requires data for two interval or ratio variables. One
is defined as the dependent variable and the other
What does the coefficient of determination measure?
Answer: For a regression analysis, the coefficient of determination measures the explained
variation in the dependent variable as a percent of the t
What can we conclude if the coefficient of determination is 0.94?
A) Strength of relationship is 0.94
B) Direction of relationship is positive
C) 94% of total variation of one variable is explained by
The technique used to measure the strength of the relationship between two variables using
the coefficient of correlation and the coefficient of determination is called regression analysis.
Answer: Fa
What is the chart called when the paired data (the dependent and independent variables) are
plotted?
A) Scatter diagram
B) Bar chart
C) Pie chart
D) Histogram
Answer: A
What does a coefficient of correlation of 0.70 infer?
A) Almost no correlation because 0.70 is close to 1.0
B) 70% of the variation in one variable is explained by the other
C) Coefficient of determin
The covariance is
A) The same sign as the correlation
B) Always greater than zero
C) Used to detect curvilinear relationships
D) Computed by multiplying two variances.
Answer: A
The Pearson product-moment correlation coefficient, r, requires that variables are measured
with:
A) An interval scale
B) A ratio scale
C) An ordinal scale
D) A nominal
E) Either A or B.
Answer: E