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C3 Unit 6 Set 2

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.
Mean Absolute Deviation (MAD) The average distance of the observations from the mean of the data in the set.
Created by: Olsons13