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33 Cards in this Set
 Front
 Back
data

observations that have been collected

statistics

collection of methods for planning studies, obtaining data, organizing, summarizing, presenting, analyzing, interpreting

population

complete collection of elements

census

collection of data from every single member of the population

sample

subcollection of members selected from the population

parameter

numerical measurement describing a characteristic of a population

statistic

numerical measurement describing some characteristic of a sample

quantitative data

numbers representing measurements or counts

qualitative or categorical data

non numerical measurements

discrete data

countable number

continuous data

infinite values, i.e decimals

ratio level of measurement

a zero starting point

center

a representative or average value that indicates where the middle of the data set is located

variation

a measure of the amount that the data values vary among themselves

distribution

nature or shape of the distribution of the data

outliers

sample values that lie very far away from the vast majority of the other sample values

frequency table

lists data values along with their corresponding frequencies

frequency

number of values that fall into that particular class

lower class limits

smallest numbers that can belong to the different classes

upper class limits

largest numbers that can belong to the different classes

class boundaries

are numbers used to separate but without the gaps created by class limits

class midpoints

values in the middle of the classes

class width

difference between two consecutive lower class limits or two consecutive lower class boundaries

relative frequency

change into percents

histogram

bar graph

horizontal on histogram

class boundaries

vertical on histogram

use class frequencies

measure of center

value of the center or middle of a data set

arithmetic mean

adding values and dividing the total by the number of values

x with a bar above it

mean of a sample

the muu

mean of a population

median

middle value when data values are arranged in order

midrange

minimum and maximum divided by two
