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1. A biologist is interested in studying the effect of growth-enhancing nutrients and different salinity (salt)of young tiger shrimp in water on the growth of shrimps. The biologist has ordered a large shipment in a shrimps from a supply house for use in the study. The experiment is to helps in a controlled environment. The biologist is planning to use 3 different growth-enhancing nutrients (A. B and C) and two different alinity levels (low and high). (a) List the treatments that the biologist plans to use in this experiment. (b) Explain how to decide which tank receives which treatment. (c) What is the response variable? (d) Give one statistical advantage to having only tiger shrimps in the experiment. Explain why this is an advantage. 2. A new headache remedy is given to a group of 25 patients who suffer severe headaches.Of these, 20 report that the remedy is very helpful in treating their headaches. From this information you conclude the remedy is effective for the treatment of headaches Which of the following best describes any inferences (conclusions) that might be made based on the data results? (A)No causal inference can be made because the sample size is too small. (B) No causal inference can be made because there is no control group for comparison. (C) No causal inference can be made since the headache relief is self-reported. (D) Causal inferences can be made since subjects were assigned to a treatment. (E) Causal inferences can be made since this is an experiment. 3. Which of the following is not required in an experimental design? (A) blocking (B) control (C) randomization

Problemas

1. A biologist is interested in studying the effect of growth-enhancing nutrients and different salinity (salt)of young tiger shrimp in water on the growth of shrimps. The biologist has ordered a large shipment in a shrimps from a supply house for use in the study. The experiment is to helps in a controlled environment. The biologist is planning to use 3 different growth-enhancing nutrients (A. B and C) and two different alinity levels (low and high). (a) List the treatments that the biologist plans to use in this experiment. (b) Explain how to decide which tank receives which treatment. (c) What is the response variable? (d) Give one statistical advantage to having only tiger shrimps in the experiment. Explain why this is an advantage. 2. A new headache remedy is given to a group of 25 patients who suffer severe headaches.Of these, 20 report that the remedy is very helpful in treating their headaches. From this information you conclude the remedy is effective for the treatment of headaches Which of the following best describes any inferences (conclusions) that might be made based on the data results? (A)No causal inference can be made because the sample size is too small. (B) No causal inference can be made because there is no control group for comparison. (C) No causal inference can be made since the headache relief is self-reported. (D) Causal inferences can be made since subjects were assigned to a treatment. (E) Causal inferences can be made since this is an experiment. 3. Which of the following is not required in an experimental design? (A) blocking (B) control (C) randomization

1. A biologist is interested in studying the effect of growth-enhancing nutrients and different salinity (salt)of young tiger shrimp in water on the growth of shrimps. The biologist has ordered a large shipment in a shrimps from a supply house for use in the study. The experiment is to helps in a controlled environment. The biologist is planning to use 3 different growth-enhancing nutrients (A. B and C) and two different alinity levels (low and high). (a) List the treatments that the biologist plans to use in this experiment. (b) Explain how to decide which tank receives which treatment. (c) What is the response variable? (d) Give one statistical advantage to having only tiger shrimps in the experiment. Explain why this is an advantage. 2. A new headache remedy is given to a group of 25 patients who suffer severe headaches.Of these, 20 report that the remedy is very helpful in treating their headaches. From this information you conclude the remedy is effective for the treatment of headaches Which of the following best describes any inferences (conclusions) that might be made based on the data results? (A)No causal inference can be made because the sample size is too small. (B) No causal inference can be made because there is no control group for comparison. (C) No causal inference can be made since the headache relief is self-reported. (D) Causal inferences can be made since subjects were assigned to a treatment. (E) Causal inferences can be made since this is an experiment. 3. Which of the following is not required in an experimental design? (A) blocking (B) control (C) randomization

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Ednamaestro · Tutor durante 5 años
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1. (a) A-low, A-high, B-low, B-high, C-low, C-high<br /> (b) Randomization<br /> (c) Growth of the tiger shrimp<br /> (d) Using only tiger shrimp ensures that any differences in growth can be attributed to the treatments and not to differences in the shrimp themselves.<br />2. (B) No causal inference can be made because there is no control group for comparison.<br />3. (B) Control

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## Step1<br />(a) The biologist plans to use three different growth-enhancing nutrients (A, B, and C) and two different salinity levels (low and high). Therefore, the treatments are: A-low, A-high, B-low, B-high, C-low, C-high.<br /><br />## Step2<br />(b) To decide which tank receives which treatment, the biologist can use a randomization method. This ensures that each treatment is equally likely to be assigned to any tank, reducing bias.<br /><br />## Step3<br />(c) The response variable is the growth of the tiger shrimp. This is what the biologist is measuring in the experiment.<br /><br />## Step4<br />(d) Using only tiger shrimp ensures that any differences in growth can be attributed to the treatments and not to differences in the shrimp themselves. This is an advantage because it isolates the effect of the treatments.<br /><br />## Step5<br />(B) No causal inference can be made because there is no control group for comparison. Without a control group, it's impossible to determine if the remedy's effectiveness is due to the remedy itself or other factors.<br /><br />## Step6<br />(B) Control is not required in an experimental design. Blocking and randomization are essential components of an experimental design to ensure that the experiment is conducted fairly and that the results are valid.
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