WGU C784-Statistics Mod 4 Flashcards
Define Mode - ANS The value that occurs most often in a data set
The Mean of a data set represents the? - ANS Average
Median of a data set - ANS The middle value of the data set
What are the two types of variables - ANS 1) Quantitative Variable 2) Categorical Variable
Quantitative variable - ANS Quantitative variable - a variable that takes a numerical value that
can be counted or measured.
Examples: height, weight, age, cholesterol level, exam scores
Categorical variable - ANS Categorical variable - a variable that is not measured; it is a
"category" or a label; it places the individual in a certain group.
Examples: gender, months of the year, zip codes
List Two Graphical Displays for Categorical Data - ANS 1) Pie Charts 2) Bar Charts
___________________ - best when we want to display different parts of a whole - ANS Pie
Charts.
_______________________ - best to display counts or frequencies for the categories - ANS
Bar Charts.
List the 4 different Graphical Displays for Quantitative Data - ANS Dot Plot - Best to display the
distribution of data, particularly clusters, gaps, and outliers. Most useful for smaller data sets.
Stem Plot (or Stem and Leaf Plot) - Best to display the distribution or shape of data according to
place values. Keeps information about individual data points.
Box Plot - Best to display the center, spread, and outliers of a given data set.
Histogram - Best to display the distribution (shape and spread) of quantitative data. Works well
with large data sets.
A stem plot is constructed by separating each data value into a stem and a leaf. The leaf is the
__________ most digit, and the stem consists of all of the digits to the __________ of the leaf. -
ANS A stem plot is constructed by separating each data value into a stem and a leaf. The leaf is
the rightmost digit, and the stem consists of all of the digits to the left of the leaf.
Define Mode - ANS The value that occurs most often in a data set
The Mean of a data set represents the? - ANS Average
Median of a data set - ANS The middle value of the data set
What are the two types of variables - ANS 1) Quantitative Variable 2) Categorical Variable
Quantitative variable - ANS Quantitative variable - a variable that takes a numerical value that
can be counted or measured.
Examples: height, weight, age, cholesterol level, exam scores
Categorical variable - ANS Categorical variable - a variable that is not measured; it is a
"category" or a label; it places the individual in a certain group.
Examples: gender, months of the year, zip codes
List Two Graphical Displays for Categorical Data - ANS 1) Pie Charts 2) Bar Charts
___________________ - best when we want to display different parts of a whole - ANS Pie
Charts.
_______________________ - best to display counts or frequencies for the categories - ANS
Bar Charts.
List the 4 different Graphical Displays for Quantitative Data - ANS Dot Plot - Best to display the
distribution of data, particularly clusters, gaps, and outliers. Most useful for smaller data sets.
Stem Plot (or Stem and Leaf Plot) - Best to display the distribution or shape of data according to
place values. Keeps information about individual data points.
Box Plot - Best to display the center, spread, and outliers of a given data set.
Histogram - Best to display the distribution (shape and spread) of quantitative data. Works well
with large data sets.
A stem plot is constructed by separating each data value into a stem and a leaf. The leaf is the
__________ most digit, and the stem consists of all of the digits to the __________ of the leaf. -
ANS A stem plot is constructed by separating each data value into a stem and a leaf. The leaf is
the rightmost digit, and the stem consists of all of the digits to the left of the leaf.
