
The art and science of collecting, interpreting, and analyzing data. 


A group of objects with common identifying characteristics; membership must be clearly defined. 


A property of a sample (example: Xbar) 


Characteristic or property of a population. 

Random Sampling Variation 

The uncertainty surrounding estimates of parameters (i.e. standard error of the mean). 


As sample size increases, the accuracy of the statistic increases. 


The shape of the sampling distribution becomes normally distributed as sample size increases regardless of the shape of the population distribution. 


‘Peakedness’ of the curve or fourth moment around the mean of a population distribution. 


Classified by quality, not quantity (example: hair color, zodiac sign) 


Constant interval and a true zero point (example: weights, volumes). 


Constant interval; zero point is arbitrary (example: C or F temperature). 


Not equal units apart(example: places in a race). 


Software that translate a program from high level language to machine language and back again. 


Each and every random set of data from a population has an equal and independent chance of being chosen. 


Data stored as strength of current. 


data stored as 1 or 0 (binary or machine language). 




Closeness of repeated measurements of the same object. 


Pattern to the errors (always over or under estimate). 


Variables that are not studied in an experiment yet can affect the response variables. 


A frequency distribution of some random variable (i.e. X) for the entire population. 


A frequency distribution of some random variable (i.e. X) for a sample. 


A theoretical frequency distribution of some statistic (i.e. Xbar) for many samples of a given sample size from a population. 


A population is broken into strata based on some variable and the sampling intensities are varied by the strata. 

Standard Error of the Mean 

The uncertainty of an estimation of a statistic of a given sample size. 


Value or datum that occurs the most in the data set. 


Datum or value that divides an order data set exactly in half. 


is the center of gravity of the frequency distribution. 
