## Ch 11 Data, Graphs, & Probability

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##### Created by:

YMS  on February 3, 2009

##### Classes:

Geometry Standards

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# Ch 11 Data, Graphs, & Probability

 dataInformation that is gathered.
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#### English

data Information that is gathered.
population The entire group of people or things that are being analyzed.
sample Part of the population upon which an experiment or survey is conducted.
survey Method to collect data from a sample to study some characteristic of the group.
representative sample Numbers that are easy to compute mentally.
biased sample A sample which is not representative of the population from which it is drawn.
statistics Numerical data that have been collected and analyzed.
random sampling Means of providing a representative sample, where each member of the population has an equal chance of being chosen.
range The difference between the greatest and the least numbers in a set of data.
mean The sum of values in a data set divided by the number of values.
median The middle value when a set of numbers is listed from least to greatest.
mode The number or numbers that occur most often in a set of data.
minimum (in a set of data) The least value in a set of numbers.
maximum (in a set of data) The greatest value in a set of numbers.
average The mean is sometimes called the average.
frequency table A table to organize data by showing the number of values that fall in particular groups.
interval Sets of number with the same range to represent data.
line plot A plot that shows the shape of a data set by stacking Xs above each value or interval on a number line.
clustering An estimation method where numbers that are approximately equal are treated as if they were equal.
outlier A number very different from the other numbers in a data set.
stem-and-leaf plot A frequency distribution that arranges data in order of place value. The leaves are the last digits of the numbers; the stems are the digits to the left of the leaves.
double-bar graph A graph that uses pairs of bars to compare information.
axis (plural of axes) Either of two lines drawn perpendicular to each other in a graph.
line graph A graph used to show changes over a period of time.
trend A clear direction in a line graph suggesting how the data will behave in the future.
double-line graph A graph that uses pairs of lines to compare information.
circle graph A graph that represents a total divided into parts.
central angle An angle with its vertex at the center of the circle.
sector A region bounded by two radii and an arc.
tree diagram A diagram used to organize all the possible outcomes in a sample space.
Counting Principle If one choice can be made in m ways and a second choice can be made in n ways, then the two choices can be made together in m x n ways.
event An outcome or set of outcomes of an experiment of situation.
outcome The result in a probability experiment.
sample space The set of all possible outcomes of an experiment.
compound event A combination of two or more single events.
permutation An arrangement of a group of things in s particular order.
combination Each possible arrangement of the outcomes of an event where order is not important.
probability A ratio of a number of ways an event can happen to the total number of possible outcomes.
impossible event An event that will never occur and have the probability of 0.
certain event An event that is sure to occur and has a probability of 1.
theoretical probability Ratio of the favorable outcomes to the possible outcomes of an event
experimental probability A probability based on the statistical results of an experiments.
trial One of the instances of an experiment.
compound event A combination of two or more single events.
mutually exclusive Events that cannot occur at the same time.
disjoint Two or more events with no outcomes in common.
independent events Events for which the outcome of one does not affect the probability of the other.
dependent events Events for which the outcome of one affects the probability of the other.

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