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# LISD 6th EUS 9

### Probability and Statistics

complementary events two events are complements if the sum of their probabilities is 1. (The probability of something happening plus the probability of it NOT happening is 1.)
experimental probability the ratio of the number of favorable results to the total number of trials in a probability experiment; is based on what DOES happen in an experiment
favorable outcome the desirable outcome
frequency table a table that lists items and uses tally marks to collect data and show the number of times they occur
interval the equal parts a scale is divided into on a graph
line plot a number line used to show frequency of data
mean the mathematical average of the data; found by finding the sum of all the data and dividing by the number of data pieces
measure of central tendency "numbers or pieces of data that can represent or summarize a whole set of data, such as mean, median, and mode"
probability ratio of favorable outcomes to total possible outcomes
sample space the set of all possible outcomes of a probability event
scale the set of numbers used to label an axis when graphing; must include the least and greatest numbers in the set
simple event a probability event that consists of exactly one outcome
statistics "the study of this topic deals with collecting, organizing, and interpreting data"
stem-and-leaf plot a display of numerical data in which each piece of the data is separated into two numbers based on place value and placed in columns of a t-chart
theoretical probability the ratio of the number of favorable outcomes to the total number of possible outcomes; is based on what should happen under perfect circumstances
tree diagram a visual representation that shows all possible outcomes in a probability event
Created by: aprilchauvette