Unit 5: Sampling and Experimentation

________: An activity in which the experimenter observes the reaction among variables rather than creating them.

________: Process of collecting information from all the units in a population.

________: refers to the process of giving a certain treatment numerous times in an experiment, or even repeating an experiment multiple times.

________: List of members from which the sample is to be taken.

________ or explanatory variable: A variable that may explain the differences in responses.

Blinding ________: used in medical experiments to prevent such a bias.

________: A variable whose effect on the response is of interest in the experiment.

________: used to average the effects of extraneous factors on responses.

________: The part of the population that is actually studied.

________: The entire group of individuals or things that we are interested in.

________: This is the smallest unit of the population to which treatment is applied.

________: A group of homogeneous experimental units.

Double- ________: both the patient and the person measuring the patients reaction do not know which treatment the patient was given.

________: when answers on a survey do not reflect the true feelings of the respondent.

________: The process of collecting information from a sample.

________: when individuals selected to be in the sample who do not respond to a survey have different opinions from those who do.

The entire group of individuals or things that we are interested in

The part of the population that is actually studied

List of members from which the sample is to be taken

The process of collecting information from a sample

Process of collecting information from all the units in a population

Planned activity that results in measurements

An activity in which the experimenter observes the reaction among variables rather than creating them

methods result in values that are systematically different from the population values or systematically favor certain outcomes

A sample of n subjects selected in such a way that every possible sample of the same size n has the same chance of being chosen

A sample in which the researcher selects some starting point and then selects every kth element in the population

A sample in which the researcher subdivides the population into at least two different subgroups (or strata), and then draws a sample from each subgroup

A sample in which the researcher first divides the population into sections (or clusters), and then randomly selects all members from some of those clusters

A sample in which the researcher simply uses results that are very easy to get

the technique used to obtain the individuals to be in the sample tends to favor one part of the population over another

when individuals selected to be in the sample who do not respond to a survey have different opinions from those who do

when answers on a survey do not reflect the true feelings of the respondent

The variable to be measured in the experiment

A variable that may explain the differences in responses

This is the smallest unit of the population to which treatment is applied

A variable whose effect on the response cannot be separated from the effect of the explanatory variable

A variable whose effect on the response is of interest in the experiment

Group of experimental units similar to all the other experimental units except that it is not given any treatment

The control group receives a treatment that looks and feels similar to an experimental treatment but is expected to have no effect

used in medical experiments to prevent such a bias

either the patient does not know which treatment he or she is receiving or the person measuring the patients reaction does not know which treatment is given

both the patient and the person measuring the patients reaction do not know which treatment the patient was given

used to average the effects of extraneous factors on responses

A group of homogeneous experimental units

refers to the process of giving a certain treatment numerous times in an experiment, or even repeating an experiment multiple times

treatments are assigned randomly to all experimental units or experimental units are assigned randomly to all treatments

All experiments are grouped by certain characteristics to form homogeneous blocks, and then a completely randomized design is applied within each block

An experimental design where participants in each condition of the experiment are matched according to important variables