Describe: is see factories next to a port by houses
Analyse: what do they make in those factories what kind of Goods do they make?
Question: how much pollution is this causing?
Researchers record the average time it takes rats to complete the maze. In this study, the number of feed pellets was independent as per Manipulation of the Independent Variable
Manipulation of the Independent Variable Again, manipulating an independent variable involves systematically altering its levels so that different groups of participants are exposed to different levels of that variable, or This means that the groups will be exposed to different levels at different times. Independent variables are variables that researchers manipulate to better understand how phenomena, structure, and behavior are related to the dependent variable and Alternative Hypothesis . Instrumental variables are the independent variables in an experiment. It's called "manipulated" because it's something you can change. That is, you can decide in advance whether to increase or decrease. Experiments should always have only one instrumental variable.
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Answer: The answer is No
Explanation: Drugs that improve cognitive functions such as Adderall and Dexedrine are stimulants. They help people with attention deficit hyperactivity disorder (ADHD) to be more focused. This type of drugs shouldn't be available to people without this disorder because it has been discovered that people misuse it and it is associated with psychosis, myocardial infarction, cardiomyopathy, and even sudden death. So this type of drug should be only available when prescribed to someone with ADHD.
My answer is a an observational study of an association between two variables
