Experimental & Observational

Front

A park ranger measures the change in height of all trees of a similar species and age over a month. Half of the trees are within a quarter of a mile from a large lake and half are further away. Is this an observational or experimental study?

Back

observational

Front

A park ranger plants 10 trees within a quarter of a mile from a large lake and 10 trees of a similar species and age further than half of a mile from the lake. He then measures the growth of all trees over a month. Is this an experimental or observational study?

Back

experimental

Front

Is the study comparing the sleeping habits of wildcats with "caves" in their cages to those without them observational or experimental?

Back

experimental

Front

A caretaker at a zoo records the sleeping habits of the wildcats at the zoo for a month. Is this an experimental or observational study?

Back

observational

Front

What is the TREATMENT in the experiment comparing online and in-person classes?

Back

class type

Front

What is the TREATMENT GROUP in the experiment comparing online and in-person classes?

Back

online class

Front

What is the CONTROL GROUP in the experiment comparing online and in-person classes?

Back

in person class