Instruction 11-7
an Agronomist Wants to Compare the Crop Yield

Instruction 11-7
An agronomist wants to compare the crop yield of three varieties of chickpea seeds. She plants 15 fields, five with each variety. She then measures the crop yield in bushels per acre. Treating this as a completely randomised design, the results are presented in the table that follows.
$\begin{array}{rrrr}\text { Trial}& \text { Smith }& \text { Walsh}& \text { Trevor }\\\hline1 & 11.1 & 19.0 & 14.6 \\2 & 13.5 & 18.0 & 15.7 \\3 & 15.3 & 19.8 & 16.8 \\4 & 14.6 & 19.6 & 16.7 \\5 & 9.8 & 16.6 & 15.2\end{array}$
-Referring to Instruction 11-7,the null hypothesis for the randomised block F test for the difference in the means is

A) H₀: M_Smith = M_Walsh = M_Trevor.
B) H₀: $\mu$ _Smith = $\mu$ _Walsh = $\mu$ _Trevor.
C) H₀: $\mu$ _{Field 1} = $\mu$ _{Field 2} = $\mu$ _{Field 3} = $\mu$ _{Field 4} = $\mu$ _{Field 5.}
D) H₀: M_{Field 1} = M_{Field 2} = M_{Field 3} = M_{Field 4} = M_{Field 5.}