The Following Data Shows the Yield, in Bushels Per Acre

question 25

Essay

The following data shows the yield, in bushels per acre, categorized according to three varieties of corn and
three different soil conditions. Assume that yields are not affected by an interaction between variety and soil
conditions, and test the null hypothesis that variety has no effect on yield. Use a 0.05 significance level. $$\begin{array} { c c c c } & \text { Plot 1 } & \text { Plot 2 } & \text { Plot 3 } \\\text { Variety 1 } & 156,167 , & 162,160 , & 145,151 , \\& 170,162 & 169,168 & 148,155 \\\text { Variety 2 } & 172,176 , & 179,186 , & 161,162 , \\& 166,179 & 160,176 & 165,170 \\\text { Variety 3 } & 175,157 , & 178,170 , & 169,165 , \\& 179,178 & 172,174 & 170,169\end{array}$$

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Definitions:

Rotor Speed

The rotational speed of the rotor in a motor or generator, usually measured in revolutions per minute (RPM).

Stator Speed

The rotation speed of the stator, which is a stationary component of electromagnetic circuits in motors or generators.

Slip Speed

The difference in speed between the rotor of an induction motor and the actual magnetic field's speed.

Split-phase Motors

A type of single-phase induction motor that uses a secondary start winding or auxiliary winding offset by electrical degrees to create a phase shift, helping to start the motor.