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MM Spring 2015

Math Models Spring 2017 Exam Vocabulary

QuestionAnswer
stem and leaf plot a visual representation of data in which the unit's and ten's are represented in separate columns
statistics collecting, organizing,analyzing, ainterpreting data and drawing conclusions based on the data
measures of central tendencies statistical values generally located toward the center of the distribution
frequency polygon line graph which connects midpoints of the histogram bars
data value numerical value associated with a data item
data numerical information
grouped frequency distribution data items organized into appropriate numerical groups
permutations an arrangement of non-repeating items in which order does matter
event a subset of the sample space
experiment any occurrence for which the outcome is uncertain
factorial product of all of the positive integers n down through 1
sample space set of all possible outcomes of an experiment
combinations an arrangement of non-repeating items in which order does not matter
empirical probability based on situations in which occurrence of events is observed
theoretical probability based on situations in which the set of all equally likely outcomes is known
median data item, or mean of two data items, that is in the middle of a set of ranked, or ordered, data
midrange the average if the highest and lowest value data items in a set of data
range the difference between the highest and lowest value data items in a set of data
standard deviation measurement of dispersion of a data set calculated using the deviation from the mean
normal distribution bell-shaped symmetrical graph with mean, median and mode all equal.
mode data item that occurs the most often in a set of data
histogram bar graph in which bars touch and the frequency is the vertical axis
inferential statistics draws conclusions from collected data
descriptive statistics concerned with collecting, organizing, summarizing, and presenting data
sample a subset or subgroup of the population
population set containing all people or objects described and analyzed by data collector
random sample sample obtained in such a way that every element in the population has an equal chance of being selected for the sample
z-score describes how many standard deviations a data item in a normal distribution lies above or below the mean
double root solution of an equation that occurs two times
cubic equation a polynomial equation of degree three
linear equation a polynomial equation of degree one
quadratic equation a polynomial equation of degree two
Zero Product Property If ab=0, then either a=0, or b=0
conjugates two binomials that are the sum and difference of the same two terms
difference of squares product of conjugates
matrix rectangular array of values
dimensions of matrix number of elements in row x columns
Created by: mcchesney
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