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1 May, 14:38

One way to measure self-discipline is the $1-now or $2-later test (which the researchers call the Delay Choice Task) in which we see if a subject would decline to accept a dollar bill now when told they could wait a week and get two dollars. Highly self-disciplined adolescents outperformed their more impulsive peers on every academic-performance variable, including report card grades. Which of the following is correct?

A. This study is an experiment, since it was based on a random sample.

B. This study is an observation study since the researchers did not assign the students to one of the self-discipline categories.

C. This study is an experiment, since each subject was classified into a self-discipline category ($1-now or $2-later) and to report card grades.

D. This study is an experiment, since it was based on a random sample

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  1. 1 May, 15:05
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    A. This study is an experiment, since it was based on a random sample.

    Step-by-step explanation:

    Simple random sampling is a probabilistic sampling procedure that gives each element of the target population and each possible sample of a given size the same probability of being selected.
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