Data: This project will use the Human Development data file provided with your text and available
on StatCrunch. The file has data for 39 countries on six variables. (NOTE: The data appearing in
this file is from several years ago, so these numbers do not reflect the current state of affairs.) The
following two variables will be used in the project:
•
•

internet = percentage of population that uses the Internet
GDP = gross domestic product in trillions of dollars

Using StatCrunch: Log on to MyStatLab and
•
•
•
•
•

select StatCrunch
select data sets from your textbook
select Human Development in the left hand column list of data sets
select the Stat button in the toolbar and Regression > Simple Linear
enter and select the appropriate values for each model indicated below.

Assignment: Using the StatCrunch software, construct a linear regression model with GDP as
explanatory variable (predictor) and internet as response variable.
Your report should include:
a) the equation for the regression line
b) an interpretation in context for the y-intercept a, if it is meaningful. If not, explain why.
c) an interpretation in context of the slope b
d) interpretations of r and r^2
e) a scatterplot of the data with a plot of the regression line. Give a brief summary of what
the plot explains.
f) predictions of Internet use for a country with GDP 30 trillion dollars and for Japan, whose
GDP is 25.13 trillion dollars.
Your project report must be typed and double-spaced. Answers, summaries, and interpretations
should, of course, be written in complete, grammatically-correct sentences. Be sure to turn your
project in on time at the start of class, Monday, July 20.

Data: This project will use the Human Development data file provided with your text and available
on StatCrunch. The file has data for 39 countries on six variables. (NOTE: The data appearing in
this file is from several years ago, so these numbers do not reflect the current state of affairs.) The
following two variables will be used in the project:
•
•

internet = percentage of population that uses the Internet
GDP = gross domestic product in trillions of dollars

Using StatCrunch: Log on to MyStatLab and
•
•
•
•
•

select StatCrunch
select data sets from your textbook
select Human Development in the left hand column list of data sets
select the Stat button in the toolbar and Regression > Simple Linear
enter and select the appropriate values for each model indicated below.

Assignment: Using the StatCrunch software, construct a linear regression model with GDP as
explanatory variable (predictor) and internet as response variable.
Your report should include:
a) the equation for the regression line
b) an interpretation in context for the y-intercept a, if it is meaningful. If not, explain why.
c) an interpretation in context of the slope b
d) interpretations of r and r^2
e) a scatterplot of the data with a plot of the regression line. Give a brief summary of what
the plot explains.
f) predictions of Internet use for a country with GDP 30 trillion dollars and for Japan, whose
GDP is 25.13 trillion dollars.
Your project report must be typed and double-spaced. Answers, summaries, and interpretations
should, of course, be written in complete, grammatically-correct sentences. Be sure to turn your
project in on time at the start of class, Monday, July 20.