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# Probability and Statistics Vocabulary

Across
Difference between a sample result and the true population result; results from chance sample fluctuations.
Collection of methods for planning experiments, obtaining data, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on data.
Procedure used in experiments whereby the subject doesn't know weather he or she is receiving a treatment or a placebo
Data consisting of numbers representing counts or measurements.
Sample of a particular size selected so that every possible sample of the same size has the same chance of being chosen
Subset of a population
Effect that occurs when an untreated subject incorrectly believes that he or she is receiving a real treatment and reports an improvement in symptoms
A situation that occurs when the effects from two or more variables cannot be distinguished from each other.
Numbers or information describing some characteristic
Repetition of an experiment
A group of subjects that are similar in the ways that might affect the outcome of an experiment.
Level of measurement of data; characterizes data that can be arranged in order and for which differences between data values are meaningful
Down
Study in which data are observed, measured, and collected at one point in time.
Sampling in which data are selected because they are readily available
Collection of data from every element in a population
Measured characteristic or sample
Study in which we observe and measure specific characteristics,but don't attempt to manipulate or modify the subjects being studied.
Data resulting from infinitely many possible values that correspond to some continuous scale that covers a range of values without gaps, interruptions, or gaps.
Data with the property with the number of possible values is either a finite number or a "countable number", which results in 0 possibilities, 1 possibility, 2, and so on.
Errors from external factors not related to sampling
Sampling in which samples are drawn from each stratum
Level of measurement of data; characterizes data that may be arranged in order,but differences between data values either cannot be determined or are meaningless.