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Introductory statistics
F distribution and one-way anova
Lab: one-way anova
One-way anova
Class Time:
Names:
Student learning outcome
The student will conduct a simple one-way ANOVA test involving three variables.
Collect the data
Record the price per pound of eight fruits, eight vegetables, and eight breads in your local supermarket.
Explain how you could try to collect the data randomly.
Analyze the data and conduct a hypothesis test
Compute the following:
Fruit:
x
¯ = ______
s
x = ______
n = ______
Vegetables:
x
¯ = ______
s
x = ______
n = ______
Bread:
x
¯ = ______
s
x = ______
n = ______
Find the following:
df (
num ) = ______
df (
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.
Decision: Why did you make this decision?
Conclusion (write a complete sentence).
Based on the results of your study, is there a need to investigate any of the food groups’ prices? Why or why not?
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Source:
OpenStax, Introductory statistics. OpenStax CNX. May 06, 2016 Download for free at http://legacy.cnx.org/content/col11562/1.18
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