In a survey, psychologists select a random sample of research participants in order to ensure that: the same number of participants will be assigned to each of the experimental conditions. the study will not be influenced by the researcher's personal values. there will be a large number of participants in the research study. the participants are representative of the population they are interested in studying.

The participants are representative of the population they are interested in studying.

Explanation:

Random sample: also known as randomly chosen sample.

The random sample is considered to be a sample that is being chosen from a particular population randomly for the administration of research. It is usually being used in research methods to avoid unwanted effects and biases.

Advantage: Every member of the population is being given equal opportunity in the process of selecting a sample.

Random sample selection is done to ensure that research is genuinely interested in studying the sample being chosen.

we need an attachment to see what you are talking about.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.