Please refer to the Chapter 26 (Non parametric Tests} for the answers of 6 thru 1D. Some researchers have suggested that stem-pitting disease in peach tree seedlings can be controlled with soil treatment. An experiment was conducted to compare peach tree seedling growth with soil and weeds treated with one of two herbicides. In an experimental lield containing 12 seedlings, six were randomlyr selected throughout the eld to receive Herbicide A. The remaining six received Herbicide B. Soil and weed for each seedling were treated with the appropriate herbicide for three months, at which point the height in centimeters was recorded for each seedling. The following results were obtained. II I . .I II . I I E I A 9?,93,91,91,89,8? B 91,?,4,?3,?4,39 5. 'When ranking all the observations together, the heights of 91 centimeters should each be assigned the rank a. 3J3. b. 8.5. c. 91}. d. 9.5