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Chpts 5 & 6
Vocabulary from Chpts 5 and 6
Vocabulary Word Definition
data information collected about people or things
survey a set of questions that is used to gather information
sample a part of the group that is chosen to represent the whole group, or population
random sample a sample for which every person in the population has an equal chance of being chosen
cumulative frequency a running total of frequencies
outlier a data value that is well-separated from other data values in a set
mean an average of a group of numbers
median the middle number when data are arranged in order
mode the number or item that occurs most often in a set of data
stem-and-leaf plot a graph that organizes data by place
pictograph a graph that uses symbols or pictures and a key to display countable data
bar graph a graph that displays countable data with vertical or horizontal bars; compares facts about groups of data
line graph a graph that shows how data change over time
trend a pattern over time, such as increasing, decreasing, or staying the same, that is shown by data in part or all of the graph
circle graph a graph that show how parts of the data are related to the whole and to each other
scale series of numbers placed at fixed distances on a graph
interval the difference between oe number and the next on the scale
ordered pair a pair of numbers used to locate a point on a grid
histogram a bar graph that shows the frequency data occur within intervals
mean the average of a set of numbers, found by dividing the sum of the set by the number of addends
median the middle number in a set of data that are arranged in ordered