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# Math Vocab Quiz

TermDefinition
Q1 First Quartile Lower Quartile The median of the lower(first)half of a data set.
5-point summary The lower extreme value The first quartile The Median The third quartile The upper extreme value
biased sample A sample in which members are not randomly selected
box plot (box-and-whisker-plot) A graphical display of the five point summary
inference a conclusion about a population made by projecting the results or a representative sample onto the whole population
interquartile range The difference between Q3 and Q1
leaf the least digit in each item of a data set when displayed in a stem and leaf plot
Q2 Median Second Quartile The middle value of a data set
MAD The average distance of the data values from the Mean
measure of variation How the data varies between quartiles and other important data points. A measure of the spread of data from a measure of center
population All the members or objects about which you want information
random sample a set of data randomly selected from a population so that every member of the population has an equal chance of being selected
range the greatest value minus the least value in a data set
sample a set of data taken from a population
sample size The number of members in a sample
Q3 Upper Quartile Third Quartile The median of the upper(second)half of a data set
simple random sampling a sampling method in which every member of the population has an equal chance of being selected
stem all digits except for the one of the least place value in an item of data displayed in a stem and leaf plot
stem-and-leaf plot a two-column graphical display in which the least digit of each item is displayed on the right and the other digits in the left
stratified random sampling a sampling method in which the population is divided into non overlapping groups from which members are randomly selected
systematic random sampling a sampling method in which the first member is randomly selected and the subsequent members are selected at regular intervals
unbiased sample same as a random same
Created by: smartie38942