Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and soil treatment. an experiment was conducted to compare peach tree seedling growth with soil and weeds treated with one of the two herbicides. in a field containing 10 seedlings, five were randomly selected throughout the field and assigned to receive herbicide

a. the remainder was to receive herbicide
b. soil and weeds for each seedling were treated with the appropriate herbicide, and, at the end of the study period, the height (cm) was recorded for each seedling. the following results were obtained: