AP Statistics; Data Analysis: (bargraph,
histogram, frequency, decimal etc)
Analyzing Categorical Data
bar graph always categorical, compares the frequency, total count, sum, or
an average of data in different categories
histogram type of bar chart that is used to represent statistical information
by way of bars to display the frequency distribution of continuous data
relative frequency is the proportion (or percent) of observations within a
category, uses pie charts
proportion Decimal form of frequency
Categorical Data Is represented by bar graphs or pie charts
pictograph are misleading
two way table summarizes data on the relationship between two
categorical variables for some group of individuals
marginal relative frequency Gives the percent or proportion of individuals
that have a specific value for one categorical variable.
joint relative frequency gives the percent or proportion of individuals that
have a specific value for one categorical variable and a specific value for
another categorical variable; often helps answer questions involving BOTH
variables
conditional relative frequencygives the percent or proportion of individuals
that have a specific value for one categorical variable among individuals who
share the same value of another categorical variable (the condition)
when comparing groups of different sizes... use relative frequencies
when analyzing categorical data
side-by-side bar graph
segmented bar graph
association when knowing one value helps us to predict another value; is a
loose connection
histogram, frequency, decimal etc)
Analyzing Categorical Data
bar graph always categorical, compares the frequency, total count, sum, or
an average of data in different categories
histogram type of bar chart that is used to represent statistical information
by way of bars to display the frequency distribution of continuous data
relative frequency is the proportion (or percent) of observations within a
category, uses pie charts
proportion Decimal form of frequency
Categorical Data Is represented by bar graphs or pie charts
pictograph are misleading
two way table summarizes data on the relationship between two
categorical variables for some group of individuals
marginal relative frequency Gives the percent or proportion of individuals
that have a specific value for one categorical variable.
joint relative frequency gives the percent or proportion of individuals that
have a specific value for one categorical variable and a specific value for
another categorical variable; often helps answer questions involving BOTH
variables
conditional relative frequencygives the percent or proportion of individuals
that have a specific value for one categorical variable among individuals who
share the same value of another categorical variable (the condition)
when comparing groups of different sizes... use relative frequencies
when analyzing categorical data
side-by-side bar graph
segmented bar graph
association when knowing one value helps us to predict another value; is a
loose connection
