In an agricultural experiment, a large uniform fieldwas planted with a single variety of wheat. The field wasdivided into many plots (each plot being ft) andthe yield (lb) of grain was measured for...

In an agricultural experiment, a large uniform fieldwas planted with a single variety of wheat. The field wasdivided into many plots (each plot being ft) andthe yield (lb) of grain was measured for each plot. Theseplot yields followed approximately a normal distributionwith mean 88 lb and standard d...