ACT-3: Estimating Lines via ActivStats Program Using the line tool, generate ran
ID: 3156562 • Letter: A
Question
ACT-3: Estimating Lines via ActivStats Program
Using the line tool, generate random scatterplots and adjust the line so that it seems to summarize the relationship. Record the slope and intercept and compare them to the least squares line slope and intercept.
Identify a response variable for this study.
Identify the factor(s) for this study.
What factors are controlled?
Can you think of other factors that you might study?
Explanation / Answer
Using the line tool, generate random scatter plots and adjust the line so that it seems to summarize the relationship. Record the slope and intercept and compare them to the least squares line slope and intercept.
Solution:
The regression line is given as
Y = 20 + 0*X
The general line of least squares or regression is given as
Y = b0 + b1*X
Where, b0 is the y-intercept and b1 is the slope for the regression line.
The y-intercept for the regression line is given as 20 and the slope for this regression line is given as 0.
This slope suggests that there is no any relationship exists between the given two variables X and Y.
Identify a response variable for this study.
Solution:
The response variable for this study is Y.
Identify the factor(s) for this study.
Solution:
The factor for this study is X.
What factors are controlled?
Solution:
The factor X is controlled.
Can you think of other factors that you might study?
Solution:
Yes, if there is a relationship observed for any other related variable with the response variable, we might study this variable.
[Please note, the stated answers are based on the available given information only.]
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