A study by Orth and colleagues (2010) was conducted to study the development of self-esteem over time. They were interested in changes in self-esteem at various ages and over time. They identified six different age cohorts (25–34, 35–44, 45–54, 55–64, 65–74, 75+) and examined their self-esteem ratings from 1986, 1989, 1994, and 2002. This type of design is best classified as a(n)

Sequential Method.

Explanation:

Here, a company allocates service cost of one department at a time. And once an accountant does this, the said department cannot receive any fund from any other part of the company.

In sequential sampling technique, there exists another step, a third option. The researcher can accept the null hypothesis, accept his alternative hypothesis, or select another pool of subjects and conduct the experiment once again. This entails that the researcher can obtain limitless number of subjects before finally making a decision whether to accept his null or alternative hypothesis.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.