F Distribution and ANOVA: ANOVA Lab
1.6
2008/06/20 10:20:12 GMT-5
2008/10/27 14:41:17.855 GMT-5
Susan
Dean
deansusan@deanza.edu
Barbara
Illowsky
illowskybarbara@deanza.edu
Susan
Dean
deansusan@deanza.edu
Barbara
Illowsky
illowskybarbara@deanza.edu
Connexions
cnx@cnx.org
elementary
statistics
This module provides a lab of F Distribution and ANOVA as a part of Collaborative Statistics collection (col10522) by Barbara Illowsky and Susan Dean.
Class Time:
Names:
Student Learning Outcome:
- The student will conduct a simple ANOVA test involving three variables.
Collect the Data
Record the price per pound of 8 fruits, 8 vegetables, and 8 breads in your local
supermarket.
- Record the price per pound of 8 fruits, 8 vegetables, and 8 breads in your local
supermarket.
- Explain how you could try to collect the data randomly.
Analyze the Data
- Compute the following:
- aFruit:
- i
x
=
- iis
x
=
- iii
n =
- aVegetables:
- i
x
=
- iis
x
=
- iii
n=
- aBread:
- i
x
=
- iis
x
=
- iii
n =
- Find the following:
- adf(num) =
- bdf(denom) =
- State the approximate distribution for the test.
- Test statistic: F =
- Sketch a graph of this situation. CLEARLY, label and scale the horizontal axis and shade
the region(s) corresponding to the p-value.
- p-value =
- Test at α=0.05. State your decision and conclusion.
- a
Decision:
Why did you make this decision?
- b
Conclusion (write a complete sentence).
- cBased on the results of your study, is there a need to further investigate any of the
food groups’ prices? Why or why not?