Question
O Macmillan Learning Attempt 5 Vanessa, a research director, is conducting an experiment to determine the effectiveness of treatment for peach trees against blight.
O Macmillan Learning Attempt 5 Vanessa, a research director, is conducting an experiment to determine the effectiveness of treatment for peach trees against blight. She randomly divides one grove's trees into three groups. One group is the control with no treatment for blight. She prunes the second group to remove the limbs showing blight after the spring rains. She prunes the third group as well and also sprays them with an antibiotic. Vanessa monitors the trees for five years after the start of the experiment. The table shows the outcomes, or the counts of how long the trees in each group lived. Treatment Outcomes None Pruning Antibiotic Totals 0 to 2 years 40 35 22 27 102 2 to 4 years More than 4 years Totals 28 28 44 42 114 15 15 22 51 88 83 101 120 304 Click to download the data in your preferred format if you wish. Crunchlt! CSV Excel JMP Mac Text Minitab14-18 Minitab18+ PC Text R SPSS TI Cale Determine the probability that a randomly selected tree from this experiment lived two to four years or was treated with an antihintir Give your anewer as a decimal nrecice to three decimal places
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