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### 23 Cards in this Set

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 Experimental probability The ratio of the number of times the outcome happened to the number of times the experiment was reported. An Event is a set of outcomes for a particular experiment. Certain Event is when an event must happen is has a probability of 1 Impossible Event is an event that can never happen- it has a probability of zero A Tree Diagram is a diagram that organizes the possible outcome for an expirement. Frequency is a number of times something occuurs in a set of data The Mean or Average is found by taking the sum of the data divided by the number of data The Mode is the most occuring piece of data The median is the middle piece of data in a set of data in numerical order The Range of data is the difference between the greatest value and the smallest value in the data set A Graph is a visual display of informmation The X-axis is the horizontal line on the graph The Y-axis is the vertical line on the graph An ordered pair is a pair of numbers used to indicate a position in a corrdinate grid a quadrant is one or four sections in a coordinate grid Algebra is a branch of mathematics that uses variables to generalize the rulesof numbers and operations A Variable is a symbol or letter that represents a number that changes or is unknown To evaluate an expression is to substitute values for variables and perform the operations An exponent tells the number of times the base is multiplied A general rule is a rule that tellsyou how to find any term in a sequence A sequence is an ordered list of numbers or objects The associative Property says that regrouping numbers when you multiply or add then does not change the result The Distributive Property for multiplication over addition says that to multiply a sum you can multiply each addened and add the products (9x(4+3)=9x4-9x3 The distributive property of multiplication over subtraction says that to multiply a difference you can multiply each number and take the difference of the products (9x(4-3)=9x4-9x3.