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# Probability Vocab

Term | Definition |
---|---|

absolute value | the distance a number is from zero on a number line |

additive inverse | two opposite integers if you add them together you will get 0 |

bar notation | in repeating decimals the line or bar placed over the digits that repeat |

circle graph | a graph used to compare parts of a whole; the circle represents the whole |

coefficient | the numerical factor of a term that contains a veriable |

composite figure | a figure that is made up of two or more three-dimensional figures |

compound event | an event consisting of two or more simple events |

cone | a three-dimensional figure with one circular base a curved surface connects the base and the vertex |

coordinate plane | a plane in which a horizontal number line and a vertical number line intersect at their zero points |

dependent events | two or more events in which the outcome of one event affects the outcome of the other event(s) |

direct variation | the relationship between two variable quantities that have a constant ratio |

discount | the percentage by which the regular price of an item is reduced |

equation | a mathematical sentence that contains an equal sign stating that two quantities are equal |

equivalent equations | two or more equations with the same solution |

experimental probability | an estimated peobability based on the relative frequency of positive outcomes occurring during an experiment it is based on what actually occurred during such an experiment |

exponent | in a power the number that tells how many times the base is used as a factor |

factors | two or more numbers that are multiplied together to form a product |

fair game | a game where each player has an equally likely chance of winning |

function | a relationship that assigns exactly one out put value |

gram | a unit of mass in the metric system equivalent to .001 kilograms the amount of matter an object can hold |

histogram | a type of bar graph used to display numerical data that have been organized into epual intervals |

independent events | two or more events in which the outcome of one event does not affect the outcome of the other event(s) |

integer | any number from the set {...,-4,-3,-2,-1,0,1,2,3,4...} where ... means continue without ends |

inverse variation | a relationship where the product of x and y is a constant k as x increases in value y decreases in value or as x increases in value or as x decreases in value y increases in value |

line of reflection | the line over which a figure is reflected |

line of symmetry | a line that divides a figure into two halved that are reflections of each other |

liter | the base unit of capacity in the metric system the amount of dry of liquid material an object can hold |

metric system | a decimal system of measures |

nonproportional | the relationship between ratios with a rate or ratio that is not constant |

ordered pair | a pair of numbers used to locate a point in the coordinate system; writen (x-cordinate, y cordinate) |

outcome | any one of the possible results of an action. |

percent of change | a ratio that compares the change in a quantity of the original amount |

percent of decrease | a negative percent of change |

percent of increase | a positive percent of change |

principal | the amount of money deposited or borrowed |

prsim | a 3-d figure with at least three rectangular lateral faces and top and bottom faces parallel |

proportional | the relationship between two ratios with a constant rate or ratio |

pyrmid | a 3-D figure with at least three lateral faces that are triangles and only one base |

quadrant | one of the 4 regions into which the two perpendicular number lines of the coordinate plane separate the plane |

rational number | a number that can be expressed as a fraction |

reflection | the mirror image produced by flipping a figure over the line |

sales tax | a percentage of money charged on items that people buy |

sample | a randomly selected group chosen for the purpose of collecting data |

scale drawing | a drawing that is used to represent objects that are too large or too small to be drawn to actual size |

similar figures | figures that have the same shape but not necessarily the same size |

simple interest | the percentage paid or earned for the use of money |

stem and leaf plot | a system where data are organized from least to greatest. |

surface area | the sum of the areas of all the surfaces of a 3-D figure |

theoretical probability | the ratio of the number of ways an event can occur to the number of possible outcomes |

volume | the number of cubic units needed to fill the space by a solid. |

simple event | one outcome or a collection or a collection of events |

random | if each event is as likely to occur as any other event |

complementary events | two events in which either one or the other must occur |

uniform probability modle | each outcome has a equal probability of happening |

tree diagram | can be used to represent sample space |

sample space | the set of all of the possible outcomes in a probability experiment |

simulation | an experiment that is designed to model the action in a given sutuation |

fundamental counting principal | the number of possible outcomes in a sample space |

permutation | a listing of arrangement or listing of objects in which order is important |

relative frequency | the ratio of the number of experimental successes to the number of experimental attempts |

unfair | not a chance! |