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# Unit 6 Set 1

### Statistics

TermDefinition
Population A set of members for which data are to be collected and analyzed with the purpose of drawing some conclusions about the population.
Census A study that gains information about every member of a population.
Sampling Choosing a portion of the population to study which resembles the entire population.
Variability How spread out a group of data is and how they vary from each other. Can be high or low.
Mean The average of the data values for a sample. Adding the numbers together and then dividing by the numbers in the set.
Median The middle data value of a sample. If two numbers fall in the middle, you add then divide by 2.
Mode The data value that occurs the most often in a sample.
Range The difference of the highest data value and the lowest data value in a sample.
Random Sample A sample that is formed by selecting individuals from the population at random.
Inference Drawing a conclusion from random data values.
Bias Intentional or unintentional favoring of one group or outcome over others in a population.
Quartile Values that divide a distribution into 4 equal groups, each having an equal amount of observations.
Interquartile Range (IQR) The distance between the first and third quartiles.
Created by: Olsons13