3. (25) An experiment was conducted in a completely randomized design to study the effect of...
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3. (25) An experiment was conducted in a completely randomized design to study the effect of insecticides and fertilizer, on the control of hornworm infestations on a crop plant. The insecticide types were four sources of bacillus, and two types of chemicals. There are 4 types of fertilizer. The number of worms present was counted before and after treatment. The results of the experiment are as follows. Fertilizer 3 4 Insecticide Before After Before After Before After Before After Bacillus 1 15 17 25 26 18 21 23 26 Bacillus 2 19 18 21 22 20 19 19 20 Bacillus 3 19 19 19 21 21 23 17 25 22 Bacillus 4 22 14 31 26 17 19 19 Chemical 1 17 5 22 26 13 18 10 Chemical 2 22 25 14 19 22 26 23 27 a. (10) Analyze the data using a=0.1 and suggest a model for this experiment b. (5) Check if the model you chose is adequate c. (10) Assess which differences among insecticides and fertilizers are significant. Which of these products are the best? Are your conclusions statistically significant? 3. (25) An experiment was conducted in a completely randomized design to study the effect of insecticides and fertilizer, on the control of hornworm infestations on a crop plant. The insecticide types were four sources of bacillus, and two types of chemicals. There are 4 types of fertilizer. The number of worms present was counted before and after treatment. The results of the experiment are as follows. Fertilizer 3 4 Insecticide Before After Before After Before After Before After Bacillus 1 15 17 25 26 18 21 23 26 Bacillus 2 19 18 21 22 20 19 19 20 Bacillus 3 19 19 19 21 21 23 17 25 22 Bacillus 4 22 14 31 26 17 19 19 Chemical 1 17 5 22 26 13 18 10 Chemical 2 22 25 14 19 22 26 23 27 a. (10) Analyze the data using a=0.1 and suggest a model for this experiment b. (5) Check if the model you chose is adequate c. (10) Assess which differences among insecticides and fertilizers are significant. Which of these products are the best? Are your conclusions statistically significant?
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Related Book For
Statistics for the Life Sciences
ISBN: 978-0321989581
5th edition
Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner
Posted Date:
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