Question | Answer |
set | any collection of objects |
empty set | a set with no objects in it |
Venn diagram | a diagram that uses geometric shapes to show how sets are related |
meter (m) | a metric unit for measuring length equivalent to 100 centimeters |
centimeter (cm) | a metric unit for measuring length, equivalent to one hundredth of a meter |
millimeter (mm) | a standard metric unit for measuring length. 10 of these is equivalent to one centimeter, 1000 of them equal a meter |
benchmark | an item whose measure you know that can be used to estimate lengths. For example, you could use your height to estimate the height of a doorway |
gram | a standard metric unit for measuring mass (weight) |
milligram (mg) | a metric unit for measuring mass (weight) 1,000 of them equal one gram |
kilogram (kg) | a metric unit for measuring mass (weight) the equivalent of 1,000 grams |
metric ton | metric mass unit of mass equivalent to 1,000 kg |
sample | part of a whole set of objects being studied |
population | a whole set of objects being studied |
percent | “per hundred” or “out of 100” |
bar graph | a graph used to compare data by comparing the lengths of bars |
range | the difference between the greatest and the least values of a set of numerical data |
line plot | a plot displaying data above the appropriate points along a scale. The scale must include the greatest and least values of the data |
average | a single number used to describe what is typical of a set of data |
mean | the sum of a set of numerical data divided by the number of data items |
median | the middle data item in a set of data in numerical order. If there is no single middle item, the number halfway between the two data items closest to the middle |
mode | the data item or items that occur most often in a set of data |
front-end estimation | a method of estimation that focuses on the left-most digits, since they have the greatest value |
trading off | a method that involves taking away from one number and adding the same amount to another number, to have numbers that are easier to add using mental math |
stem-and-leaf plot | a display of data where each number is represented by a stem (the leftmost digits) and a leaf (the rightmost digits) |