WGU C784-Statistics Mod 4 || All Solved.
Define Mode correct answers The value that occurs most often in a data set
The Mean of a data set represents the? correct answers Average
Median of a data set correct answers The middle value of the data set
What are the two types of variables correct answers 1) Quantitative Variable 2) Categorical
Variable
Quantitative variable correct answers 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 correct answers 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 correct answers 1) Pie Charts 2) Bar Charts
___________________ - best when we want to display different parts of a whole correct answers
Pie Charts.
_______________________ - best to display counts or frequencies for the categories correct
answers Bar Charts.
, List the 4 different Graphical Displays for Quantitative Data correct answers 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.
correct answers A stem plot is constructed by separating each data value into a stem and a leaf.
The leaf is the right most digit, and the stem consists of all of the digits to the left of the leaf.
Note: Represent each number that is in the ones place from the list of numbers. By doing this the
stems will consist of ones, twos, threes, and fours. Next list the leafs by taking the digit to the
right and writing it within the coloumn/stem that matches the ones place holder of the number.
Example 31 the ones place/ stem is "3" the Leaf which is to the right of the number is "1".
After listing all stems and leafs. Re-arrange them in increasing order.
If the list of numbers is long or big you can split the stem and leaf into two sets. Ex. the first stem
set of 1 will list any leafs 1-5 while the second stem leaf set can list any leafs 6-9. See thirs graph
for illustration
What 4 analysis are needed to describe a distribution correct answers 1. The shape of the
graphical display
2. The center and spread of the data
3. The maximum and minimum values
Define Mode correct answers The value that occurs most often in a data set
The Mean of a data set represents the? correct answers Average
Median of a data set correct answers The middle value of the data set
What are the two types of variables correct answers 1) Quantitative Variable 2) Categorical
Variable
Quantitative variable correct answers 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 correct answers 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 correct answers 1) Pie Charts 2) Bar Charts
___________________ - best when we want to display different parts of a whole correct answers
Pie Charts.
_______________________ - best to display counts or frequencies for the categories correct
answers Bar Charts.
, List the 4 different Graphical Displays for Quantitative Data correct answers 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.
correct answers A stem plot is constructed by separating each data value into a stem and a leaf.
The leaf is the right most digit, and the stem consists of all of the digits to the left of the leaf.
Note: Represent each number that is in the ones place from the list of numbers. By doing this the
stems will consist of ones, twos, threes, and fours. Next list the leafs by taking the digit to the
right and writing it within the coloumn/stem that matches the ones place holder of the number.
Example 31 the ones place/ stem is "3" the Leaf which is to the right of the number is "1".
After listing all stems and leafs. Re-arrange them in increasing order.
If the list of numbers is long or big you can split the stem and leaf into two sets. Ex. the first stem
set of 1 will list any leafs 1-5 while the second stem leaf set can list any leafs 6-9. See thirs graph
for illustration
What 4 analysis are needed to describe a distribution correct answers 1. The shape of the
graphical display
2. The center and spread of the data
3. The maximum and minimum values
