This module provides a lab of Linear Regression and Correlation as a part of Collaborative Statistics collection (col10522) by Barbara Illowsky and Susan Dean.
Class Time:
Names:
Student learning outcomes:
The student will calculate and construct the line of best fit between two variables.
The student will evaluate the relationship between two variables to determine if that relationship is significant.
Collect the data
Survey 10 textbooks. Collect bivariate data (number of pages in a textbook, the cost of the
textbook).
Complete the table.
Number of pages
Cost of textbook
Which variable should be the dependent variable and which should be the independent
variable? Why?
Graph “distance” vs. “cost.” Plot the points on the graph in "Analyze the Data". Label both axes with
words. Scale both axes.
Analyze the data
Enter your data into your calculator or computer.
Write the linear equation below, rounding to 4 decimal places.
Calculate the following:
=
=
correlation =
=
equation:
=
Supply an answer for the following senarios:
For a textbook with 400 pages, predict the cost:
For a textbook with 600 pages, predict the cost:
Obtain the graph on your calculator or computer. Sketch the regression line below.
Discussion questions
Answer each with 1-3 complete sentences.
Does the line seem to fit the data?
Why?
What does the correlation imply about the relationship between the number of pages
and the cost?
Are there any outliers? If so, which point(s) is an outlier?
Should the outlier, if it exists, be removed? Why or why not?
Questions & Answers
why economics is difficult for 2nd school students.
economics theory describes individual behavior as the result of a process of optimization under constraints the objective to be reached being determined by
Kalkidan
Economics is a branch of social science that deal with How to wise use of resource ,s
Kassie
need
WARKISA
Economic Needs: In economics, needs are goods or services that are necessary for maintaining a certain standard of living. This includes things like healthcare, education, and transportation.
Money market is a branch or segment of financial market where short-term debt instruments are traded upon. The instruments in this market includes Treasury bills, Bonds, Commercial Papers, Call money among other.
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Source:
OpenStax, Collaborative statistics using spreadsheets. OpenStax CNX. Jan 05, 2016 Download for free at http://legacy.cnx.org/content/col11521/1.23
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