14.3 A common science-fair project involves testing the effects of music on the

Question

14.3 A common science-fair project involves testing the effects of music on the growth of plants. For one of these projects, a sample of 24 newly sprouted bean plants is obtained. These plants are randomly assigned to four treatments, with n = 6 in each group. The four conditions are rock, heavy metal, country, and classical music. The dependent variable is the height of each plant after 2 weeks. The data from this experiment were examined using an ANOVA, and the results are summarized in the following table. Fill in all of the missing values. (Hint: start with the df column using the formula sheet part IIL) df Source Between treatments Within treatments Total or 60

Explanation / Answer

for df between treatments =groups-1 =4-1=3

df within treatments =N-lk=24-4=20

df total =N-1=19

also MS =SS/df

therefore below is complete table:

source SS df MS F between treatments 60 3 20 10 within treatments 40 20 2 total 100 23

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