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Definition
overrepresents or underrepresents part of the population 


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representative subset of the population you want information about 


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an arrangement of the values (usually in table format) that one or more variables take in a sample 


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statistical chart consisting of data points plotted on a simple scale, typically using filled in circles 


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68% of data lies within 1 standard deviation of the mean; 95% of data lies within 2 standard deviations of the mean; 99.7% of data lies within 3 standard deviations of the mean 


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Definition
a statistic that tells you how dispersed, or spread out, data values are (e.g. range, variance, and standard deviation)



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Definition
the square of standard deviation, σ^{2} 


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Definition
a measure of dispersion from the mean that uses all data values; can be for a sample (S_{x}) or a population(σ_{x}) 


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modeled by a bellshaped curve that is symmetric about the mean with a total area under the curve of 1 and has an equal mean, median, and mode 


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draws inferences about the possible effect of a treatment on subjects, where the assignment of subjects into a treated group versus a control group is outside the control of the investigator 


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a measure of center of a set of data; symbolized by μ for a population and xbar for a sample 


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collection of all outcomes, responses, measurements, or counts. 


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Definition
similar to a sample statistic but generally an unobservable quantity describing a property of a statistical population



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Definition


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Definition
subset of individuals (a sample) chosen from a larger set (a population) such that each individual has the same probability of being chosen at any stage during the sampling process 


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the normal distribution with mean 0 and standard deviation 1. 


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Definition


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Standard Deviation of a Sampling Mean Formula 

Definition


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Definition
simple measure of dispersion that uses 2 data values, MaxMin



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difference between a data point and the mean 


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consists of info coming from observation counts, measurements, or responses. 


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the science of collecting, organizing, analyzing, and interpreting data



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when a vertical line can be drawn through the middle & resulting halves are mirror images



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Definition
has equal frequency throughout distribution 


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Definition


Term
Skewed Right Distribution 

Definition
tail extends to the right 

