A Farmer Wishes to Test the Effects of a New

question 103

Multiple Choice

A farmer wishes to test the effects of a new fertilizer on her tomato yield. She has four equal-sized plots ofland-- one with sandy soil, one with rocky soil, one with clay-rich soil, and one with average soil. She divideseach of the four plots into three equal-sized portions and randomly labels them A, B, and C. The four Aportions of land are treated with her old fertilizer. The four B portions are treated with the new fertilizer, andthe four Cʹs are treated with no fertilizer. At harvest time, the tomato yield is recorded for each section of land.What type of experimental design is this?

• A) randomized block design
• B) completely randomized design
• C) matched-pairs design
• D) double-blind design

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Definitions:

Papule

A small, raised, solid pimple or swelling on the skin, often forming part of a rash.

Flat Lesion

A skin change that is level with the surrounding skin and cannot be felt; it is observed rather than felt.

Different Pigmentation

Variations in skin color among individuals due to differences in melanin production and distribution.

Macule

A flat, distinct, discolored area of the skin smaller than 1 cm in diameter, not involving any change in the thickness or texture of the skin.