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 Flashcards Matching Hangman Crossword Type In Quiz Test StudyStack Study Table Bug Match Hungry Bug Unscramble Chopped Targets

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# Tests 11 & 12 Review

### Original Price, Percent of Change, Simple Interest, Probability, Statistics

TermDefinition
Circumference of a Circle C = pi * d d = diameter
Area of a Circle A = pi * r^2 r = radius
Diameter a straight line going through the center of a circle connecting two points on the circle; twice the length of the radius
Radius the distance from the center to the edge of a circle; half the length of the diameter
Probability the chance that something will happen; the number of ways the event can occur over the total number of possible outcomes; ranges from 0 (0%) - 1.0 (100%)
Sample Space a list of all the possible outcomes; each outcome should be written in parentheses with a comma between events. For example (Heads, 6) represents flipping a heads on a coin and then rolling a 6 on a number cube
Impossible Event never going to happen; probability = 0 or 0%
Certain Event definitely going to happen; probability = 1/1 or 1.0 or 100%
Independent Events the outcome of one event DOES NOT affect the probability of the other event; example: rolling a number cube and then flipping a coin
Dependent Events the outcome of one event DOES affect the probability of the other event; example: picking a jelly bean from a jar, eating it, and then picking a second
Theoretical Probability what you expect to happen
Experimental Probability what actually happens
Simulation an experiment designed to model the action in a given situation. For example, flipping a coin could be used as a simulation for having a boy or girl baby.
Mean average - add up all the numbers and divide by how many numbers there are
Median the middle number when the numbers are listed in order from least to greatest
Mode the number that appears most often
Range the difference between the highest value and lowest value
Interquartile Range the difference between the third quartile and the first quartile; shows how spread out the data is around the median
Box and Whisker Plot shows the distribution of data - the first dot represents the lower extreme, the second dot represents the first quartile, the third dot represents the median, the fourth dot represents the third quartile and the last dot represents the upper extreme.
Biased Sample An unfair sample; the results of a biased sample are NOT VALID
Unbiased Sample A fair sample; the results of an unbiased sample ARE VALID
Simple Random Sample An unbiased sample where everyone equally likely to be chosen to be surveyed
Systematic Random Sample An unbiased sample where people are chosen according to a system or time interval
Convenience Sample The people surveyed are easily accessed
Voluntary Response Sample The people surveyed choose to respond to the survey question; they voluntarily respond
Created by: Math7