Question

independent practice
determine if the following study is best described as an observational study, survey, or experiment.
a student wanted to estimate the probability that a tree would fall down within a year. she counted the number of trees on a 5 acre property. then, after a year had passed, she counted the number of trees remaining on the same 5 acre property.
observational study
survey
experiment
none of the above.

Explanation:

An observational study simply observes and records data without interfering. Here, the student just counted trees initially and after a year without any manipulation. A survey involves asking questions. An experiment manipulates variables. Since there's no manipulation or questioning, it's an observational study.

Answer:

Observational Study