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7th Math C6 Savvas

Pruit 7th Math C6 Savvas

TermDefinition
inference a judgment made by interpreting data
infer the act of making a judgment by interpreting data
informal comparative inferences data-based predictions or generalizations that contrast two or more populations without relying on formal, complex mathematical formulas
population the complete set of items being studied`
qualitative inferences drawing categorical conclusions such as presence/absence or directions rather than estimating exact numerical parameters
random sample in this sample, each member in the population has an equal chance of being selected
representative sample a sample of a population in which the number of subjects in the sample with the trait that you are studying is proportional to the number of members in the population with that trait
sample It is part of the population you want to study when you do not have the resources to study every member of the population
valid inference an inference that is true about the population
box plot a statistical graph that shows the distribution of a data set by marking five boundary points where data occur along a number line but does not show frequency
cluster a group of points that lie close together on a scatter plot
data pieces of information collected by asking questions, measuring, or making observations about the real world
distribution describes the way that the data values are spread out over all possible values
dot plot a statistical graph that shows the shape of a data set with stacked dots above each data value on a number line.
interquartile range the distance between the first and third quartiles of a data set
IQR interquartile range
mean the center of a numerical data set
mean average distance mean absolute deviation
MAD mean absolute deviation
measure of center a value that represents the middle of a data set
measure of spread describes how far apart of scattered the data points in a dataset are from each other and from the center
measure of variability describes the spread of values in the data set
median the center of a numerical data set
mode the item, or items, in a data set that occurs most frequently
proportion an equation stating that two ratios are equal
proportional reasoning the cognitive ability to compare, analyze, and interpret numerical data using ratios, fractions and percentages rather than raw quantities
quartile one of four equal parts of a data set
range the difference between the greatest and least values in a data set
ratio a relationship in which for every x units of one quantity there are y units of another quantity
statistical measure quantitative values used to summarize, describe, and interpret the characteristics of a data set
statistical question a question that investigates an aspect of the real world and can have variety in the responses
survey a method of gathering information from a subset of a population to make inferences, draw conclusions or make predictions about the entire population
valid refers to how accurately a method, test, or study measures what it is intended to measure
mean absolute diviation a measure of spread that calculates how far, on average, each data point in a set is from the data's mean
 



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