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# Unit 7 - Mr. Hunt

### Statistics and Comparing Populations

TermDefinition
sample size a small amount of something selected at random from the whole that shows what the whole looks like
statistics the study of data: how to collect, summarize, and present it
survey to gather information by individual samples so as to learn about the whole thing
biased sample an small amount of something that does not fairly represent the whole
inferences the process of reaching a conclusion about something from known facts or evidence
data a collection of facts, such as numbers, words, measurements, observations, or even just descriptions of things
hypothesis a statement that might be true, which can then be tested
population the whole group from which a sample is taken
random sampling a selection that is chosen randomly
mean a measure of center that is found by dividing the sum of the data by the number of numbers in the data
range a measure of variability that is found by subtracting the minimum from the maximum in a set of data
MAD a measure of variability that is found by taking the mean of the all the absolute value deviations of a set of data.
median a measure of center that is found by looking at the middle number when the data is ordered from least to greatest
minimum the smallest piece of data
maximum the largest piece of data
Created by: mrhunt