Lawn Fertilizer
to Test the Effectiveness of Three Different Types

question 162

Essay

Lawn Fertilizer
To test the effectiveness of three different types of lawn fertilizer,each type was applied to six different lawns.The same size patch of lawn was mowed for all 18 test units and the grass clippings were weighed.The weight in pounds are shown in the following table.
$$\begin{array} { | c | c | c | c | } \hline & \text { Fertilizer 1 } & \text { Fertilizer 2 } & \text { Fertilizer 3 } \\\hline \text { Lawn 1 } & 10.3 & 11.7 & \mathbf { 8 . 2 } \\\hline \text { Lann 2 } & \mathbf { 8 . 6 } & 12.0 & \mathbf { 8 . 9 } \\\hline \text { Lawn 3 } & \mathbf { 8 . 2 } & 9.3 & 10.7 \\\hline \text { Lawn 4 } & 10.6 & 10.5 & 9.3 \\\hline \text { Lawn 5 } & 9.1 & 9.8 & 10.4 \\\hline \text { Lawn 6 } & \mathbf { 8 . 2 } & 12.4 & 9.6 \\\hline\end{array}$$
-Develop a randomized block design to test for the difference between the average number of customers per day between four different stores using $\alpha$ = 0.05 and using the days as the blocking variable.
State the decision rule in terms of the critical value.
What is your conclusion?

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Definitions:

Inhibitory Action Potentials

Electrical signals in neurons that decrease the likelihood of the neuron firing, thus reducing neuronal activity.

Sacral Region

The area of the body related to the sacrum, a triangular bone at the base of the spine formed by the fusion of five sacral vertebrae.

Myogenic Mechanism

A physiological mechanism by which blood vessels automatically adjust their resistance to maintain constant blood flow despite changes in arterial blood pressure.

Afferent Arterioles

Small blood vessels that carry blood toward the nephrons in the kidneys, regulating blood pressure and filtration.