Question

part1. A double-blind design is important in an experiment because there is a natural tendency for subjects in an experiment to want to please the researcher.

a. True

b. False

part 2.

Sampling error concerns natural variation between samples, and is always present.

a. True

b. False

part 3. Sampling error can only be eliminated when conducting a questionnaire of students and every question is a closed question.

a. True

b. False

Answer 1

1) True

A double-blind procedure refers to a procedure in which experimenters and participants are “blind to” (without knowledge of) crucial aspects of a study, including the hypotheses, expectations, or, most important, the assignment of participants to experimental groups.

The double-blind procedure helps minimize the possible effects of experimenter bias. Such biases often involve the researchers unknowingly influencing the results during the administration or data collection stages of the experiment. Researchers sometimes have subjective feelings and biases that might have an influence on how the subjects respond or how the data is collected.

2) True

Part 3)False, Sampling error refers to the natural variation between samples. For example, when did the Random M&M’s activity everyone may end up with a different average pile size because the calculator may give different random numbers. That’s sampling error and it can never be eliminated.