2/6/2023-HW Experimental Design
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Last updated over 2 years ago
16 questions
Required
1
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What is the explanatory variable?
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What is the explanatory variable?
Required
1
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What is the response variable?
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What is the response variable?
Required
1
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What are the experimental units?
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What are the experimental units?
Required
1
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What is a possible confounding variable?
Does regularly taking aspirin help protect people against heart attacks? The Physicians’ Health Study I was a medical study that helped answer this question. The subjects in this experiment were 21,996 male physicians. Half of these subjects took an aspirin tablet every other day and the remaining subjects took a dummy pill that looked and tasted like the aspirin but had no active ingredient. After several years, 239 of the control group but only 139 of the aspirin group had suffered heart attacks. This difference is large enough to provide convincing evidence that taking aspirin does reduce heart attacks.
What is a possible confounding variable?
Required
1
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What is the exploratory variable?
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What is the exploratory variable?
Required
1
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What is the response variable?
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What is the response variable?
Required
1
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What are the experimental units?
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What are the experimental units?
Required
1
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What will be a possible confounding variable?
The extracts of avocado and soybean oils have been shown to slow cell inflammation in test tubes. Will taking avocado and soybean unsaponifiables (called ASU) help relieve pain for subjects with joint stiffness due to arthritis? In an experiment, 345 men and women were randomly assigned to receive either 300 milligrams of ASU daily for three years or a placebo daily for three years.
What will be a possible confounding variable?
Required
1
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What is the explanatory variable?
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What is the explanatory variable?
Required
1
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What is the response variable?
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What is the response variable?
Required
1
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What are the experimental units?
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What are the experimental units?
Required
1
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What is a possible confounding variable?
Erica loves houseplants. She recently heard that plants love dirty fish tank water. To see if the fish tank water makes a difference, for 8 weeks she watered half of her plants with water from her fish tank and half of her plants with water from the sink. After 8 weeks she gauged the health of the plants by looking for new growth or a substantial change in height.
What is a possible confounding variable?
Required
1
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What is the explanatory variable?
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What is the explanatory variable?
Required
1
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What is the reponse variable?
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What is the reponse variable?
Required
1
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What are the experimental units?
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What are the experimental units?
Required
1
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What is a possible confounding variable?
In a study of motivation, 50 volunteers were divided into 2 groups. All 50 volunteers underwent a brief fitness assessment. The members of one group were given a virtual fitness buddy that encouraged daily exercise through an app they downloaded on their phones. The other group members were not given any support. Both groups were instructed to log all workouts for a period of 2 weeks. At the end of the two weeks all volunteers were given a second fitness assessment and the workout logs were studied. The group that had access to the virtual fitness buddy showed a significant improvement in overall fitness and they logged more workouts than the group that received no support.
What is a possible confounding variable?