a single number that indicates the overall characteristic of a set of data

What the experimenter manipulates/controls to see what the effects are of the experiment

the process of selecting a representative group from the population under study

The tendency upon hearing about research findings (etc.) to think that they knew it all along

the presence of one thing predicts the presence of the other

An observation with value at the boundaries of the domain

a variable whose value depends on that of another

a group of people, objects, or items that are taken from a larger population for measurement

Research in order to solve practical problems

Involves asking people to fill out surveys

observation which appears to be inconsistent with the remainder of that set of data

a broad idea or set of closely related ideas that attempts to explain observations & to make predictions about future observations

The entire set of possible observations that may be made on the statistical universe

Research that explores questions that are of interest without real world application

the presence of one thing predicts the absence of another

The mean and median will be greater than the mode

a definition that provides an objective description of how a variable is going to be measured & observed in a particular study

a group that closely matches the characteristics of its population as a whole

An educated guess that derives logically from a theory; a prediction that can be tested

the number of individuals who complete an interview, answer a survey, or join a research study compared to the number who were invited to participate, often expressed as a percentage

a numerical measurement that describes a value's relationship to the mean of a group of values

how accurately a method measures what it is intended to measure

a subset of individuals randomly selected by researchers to represent an entire group as a whole

eliminates experimenter bias, neither participants nor researcher are able to affect the outcome of the research

involves observing subjects in their natural environment. It can be used if conducting lab research would be unrealistic, cost-prohibitive, or would unduly affect the subject's behavior