| A | B |
|---|
| Data | is 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 |
| Representive sample | A sample which is representaive of the population from which it is drawn |
| biased sample | a sample which is not representive of the population from which it is drawn |
| statistics | numerical data that have been collected and analyzed |
| random sampling | means of provideing a representive sample, where each member of the population has an equal chance of being chosen |
| range | the difference between the greatest and least set of numbers |
| mean | the sum of the 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 |
| maximum | the greatest value in a set of numbers |
| minimum | the least value in a set of numbers |
| Frequency table | a table to organize data by showing the number of values that fall in particular groups |
| interval | sets of numbers with the same range to reresent 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 |
| 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 dights of numbers; the steams are the dights to the left of the leaves |
| axis | either of two lines drawn perpendicular to each other in a graph |
| double bar graph | a graph that uses pairs of bars to compare infromation |
| 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 infromation |
| circle graph | a graph that represents a total divided into parts |
| central angle | an angle with its vertex at the center of a circle |
| sector | a region bounded by two radii and arc |
| tree diagram | Adiagram used to orgnize all the possible outcomes in a sample space. |
| counting principle | If one choice cam be made in m ways and a second choice cam 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 or situation. |
| outcome | The result in a prbability 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 of things in a particular order. |
| combination | Each possible arrangement of the outcones of an event where order is not important. |
| probability | A ratio of the number of ways an event can happen to the total number of possible outcomes. |
| impossible event | An event will never occur and has a probability of 0. |
| certain event | An event that is sure to happen and has a probability of 1. |
| theoretical probability | / |
