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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
