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a study involving women aged 50 to 75 randomly assigned equal numbers of women to an exercise program (at least 45 minutes of moderate walking or riding an exercise bike five times a week) and to a stretching program (15 to 30 minutes of stretching three times a week, under the supervision of an exercise physiologist). it was found that a higher percentage of women in the exercise group reported improved sleep than did women in the stretching group. this study is an example of

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This study is an example of an experiment, but not a double-blind experiment.

What is experiment?

An experiment is a method for gathering data under controlled circumstances in order to discover and comprehend causal correlations between variables. Researchers have a wide range of options for designs. The final decision is based on the study topic, available resources, objectives, and restrictions. A method with an unlimited number of possible outcomes, known as the sample space, is referred to as an experiment or trial in probability theory (see below). If there are several possible outcomes from an experiment, it is considered to be random; if there is just one, it is said to be deterministic.

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