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WGU C955 Applied Probability and Statistics Module 5: Descriptive Statistics two Variables Exam Review Questions and Answers 2024/2025$11.99
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WGU C955 Applied Probability and Statistics Module 5: Descriptive Statistics two Variables Exam Review Questions and Answers 2024/2025
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WGU C955
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WGU C955
WGU C955 Applied Probability and Statistics Module 5: Descriptive Statistics two Variables Exam Review Questions and Answers 2024/2025
Five-number summary - correct answer the minimum, first quartile, median, third quartile, and the maximum. A box plot represents the five numbers in a five-numbe...
WGU C955 Applied Probability and Statistics
Module 5: Descriptive Statistics two Variables
Exam Review Questions and Answers
2024/2025
Five-number summary - correct answer the minimum, first
quartile, median, third quartile, and the maximum. A box plot
represents the five numbers in a five-number summary.
Two-way frequency table - correct answer A table that
contains frequency counts for two categorical variables. [See
also contingency table]
Joint frequencies - correct answer the frequency counts in
each cell of the table.
Contingency table - correct answer A table that contains
frequency counts for two categorical variables. [See also two-way
frequency table]
Linear - correct answer An expression or equation of degree
1.
Response variable - correct answer The variable that is
obtained as a result, or the response that gets measured or
observed. Also called a Dependent variable.
,Conditional percentages - correct answer A way to
approximate a percentage by dividing the number of times an
event occurred in an experiment by the total number of
respondents in that row or column. See relative frequency.
Negative correlation - correct answer When two quantitative
variables move in opposite directions: as the explanatory variable
increases the response variable decreases.
Coordinate plane - correct answer A tool used for graphing
that is a display of a two-dimensional plane. It consists of an x-
axis and a y-axis; the x-axis being a horizontal number line, the y-
axis is a vertical number line, and the axes meet at the origin (0,
0).
Positive correlation - correct answer When two quantitative
variables move in the same direction; the response variable
increases when the explanatory variable increases.
Independent variable - correct answer The variable that may
be the cause of some result, or is presented as variable that
offers an explanation. Also called an explanatory variable.
Ordered pair - correct answer Two numbers written in the
form (x,y), where x represents the x-value or x-coordinate, and y
represents the y-value or y-coordinate.
Correlation - correct answer An observed relationship
between two quantitative variables. While this is most commonly
a linear relationship, it does not need to be.
,No correlation - correct answer There is no apparent overall
trend between the two variables. If the correlation coefficient is
0, this only rules out a linear trend. There could be a non-linear
or curvilinear trend.
Cluster - correct answer Several points are grouped together
away from the majority of points in a data set.
Relative frequency - correct answer A way to approximate a
percentage by dividing the number of times an event occurred in
an experiment by the total number of trials.
Marginal frequencies - correct answer The totals of each row
and column in a table; given this name because they are in the
'margins' of the table.
Explanatory variable - correct answer The variable that may
be the cause of some result, or is presented as variable that
offers an explanation. Also called an Independent variable.
Non-linear - correct answer An expression or equation that is
illustrated by something other than a straight line.
Dependent variable - correct answer The variable that is
obtained as a result, or is the response that gets measured or
observed. Also called a response variable.
, Box plot - correct answer A graphical rendering of the range
and the first and third quartiles of a data set with the data set's
median in the center.
Scatterplot - correct answer A graph that uses dots on a
coordinate plane to show the relationship between two
quantitative variables.
Outlier - correct answer An observation point that is
significantly distant from the other observations in the dataset.
The relationship between the two variables on a scatterplot can
be measured by what statistic?
{{ Scatterplot of sales on the x-axis and profit index on the y-
axis. }}
A Correlation coefficient ( r )
B Regression
C ANOVA
D Chi-square - correct answer Correlation coefficient ( r )
A study was completed to investigate if commutes of longer than
30 minutes increased the risk of burnout. The results of the study
are in the table below.
,Lenth of Commute ,<30 Minutes ,>30 Minutes ,Total
Risk of Burnout ,Negative for Burnout ,185 ,72 ,257
,Positive for Burnout ,98 ,247 ,345
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