11 Some researchers have suggested that stem pitting disease in peach tree seedlings can be...
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11 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 field containing 12 seedlings 6 were randomly selected throughout the field to receive Herbicide A The remaining 6 received Herbicide B Soil and weeds 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 Herbicide A B Let W the Wilcoxon rank sum test statistic be the sum of the ranks assigned to the heights of peach seedlings receiving Herbicide A a 7 b 8 Height cm 97 93 91 91 89 87 91 87 84 78 74 69 When ranking all the observations which rank should be assigned to the heights of 89 cm C 8 5 d 9
11 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 field containing 12 seedlings 6 were randomly selected throughout the field to receive Herbicide A The remaining 6 received Herbicide B Soil and weeds 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 Herbicide A B Let W the Wilcoxon rank sum test statistic be the sum of the ranks assigned to the heights of peach seedlings receiving Herbicide A a 7 b 8 Height cm 97 93 91 91 89 87 91 87 84 78 74 69 When ranking all the observations which rank should be assigned to the heights of 89 cm C 8 5 d 9
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