A Horticulturist Wants to Test the Effectiveness of Four Types

question 13

Multiple Choice

A horticulturist wants to test the effectiveness of four types of fertilizer on the growth rate of Bermuda grass.Six sections of grass are randomly assigned to each of the four fertilizer types,and the rate of growth for each section is measured.The box plots for the four types of fertilizer are shown below.

• A)Yes,the widths of all the boxes are the same.
• B)No,the data need to be log-transformed before conducting the ANOVA.
• C)No,the centre lines for fertilizers three and four are higher than one and two.
• D)Yes,the spreads of the four box plots appear similar enough to satisfy the assumption.
• E)No,the data probably need to be re-expressed before conducting the ANOVA.

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