WGU C955 FINAL EXAM PAPER 2026
QUESTIONS AND CORRECT SOLUTIONS
GRADED A+
⩥ best used to display categorical data. Answer:
⩥ How are the mean, median, and mode of a sample related if the
distribution is normally distributed?. Answer: The values are all equal
⩥ IQR (interquartile range). Answer: Q3-Q1
⩥ standard deviation. Answer: Using the Standard Deviation Rule, we
know that when data is normally distributed, 50% of the values fall
above the mean, and 50% of the values fall below the mean.
⩥ population sample from a box plot.. Answer: It is not possible to
estimate the size of the population sample from a box plot.
⩥ Pie chart. Answer: A pie chart is the best type of graph to use to show
categorical data, where each category represents a share of the total as a
percent.
, ⩥ Scatterplot. Answer: A scatterplot is a graphical display that shows the
explanatory variable on the x-axis and the response variable on the y-
axis. Is useful when both variables in the data set are quantitative.
⩥ Cluster. Answer: If several points are grouped together away from the
majority of points, we call them a cluster.
⩥ two-way frequency table.. Answer: The best method to display two
categorical (words) variables is a two-way frequency table.
Has rows and columns
⩥ Side-by-side box plots. Answer: Side-by-side boxplots are useful
when the explanatory variable is categorical and the response variable is
quantitative.
⩥ Simpson's Paradox. Answer: A counterintuitive situation in which a
trend in different groups of data disappears or reverses when the groups
are combined. Simpson's paradox is avoided by having an equal number
of subjects exposed to each of the treatments in each trial.
⩥ association. Answer: A pattern or relationship between two variables.
⩥ causal relationship. Answer: A relationship between two variables that
can be classified as cause-and-effect.
QUESTIONS AND CORRECT SOLUTIONS
GRADED A+
⩥ best used to display categorical data. Answer:
⩥ How are the mean, median, and mode of a sample related if the
distribution is normally distributed?. Answer: The values are all equal
⩥ IQR (interquartile range). Answer: Q3-Q1
⩥ standard deviation. Answer: Using the Standard Deviation Rule, we
know that when data is normally distributed, 50% of the values fall
above the mean, and 50% of the values fall below the mean.
⩥ population sample from a box plot.. Answer: It is not possible to
estimate the size of the population sample from a box plot.
⩥ Pie chart. Answer: A pie chart is the best type of graph to use to show
categorical data, where each category represents a share of the total as a
percent.
, ⩥ Scatterplot. Answer: A scatterplot is a graphical display that shows the
explanatory variable on the x-axis and the response variable on the y-
axis. Is useful when both variables in the data set are quantitative.
⩥ Cluster. Answer: If several points are grouped together away from the
majority of points, we call them a cluster.
⩥ two-way frequency table.. Answer: The best method to display two
categorical (words) variables is a two-way frequency table.
Has rows and columns
⩥ Side-by-side box plots. Answer: Side-by-side boxplots are useful
when the explanatory variable is categorical and the response variable is
quantitative.
⩥ Simpson's Paradox. Answer: A counterintuitive situation in which a
trend in different groups of data disappears or reverses when the groups
are combined. Simpson's paradox is avoided by having an equal number
of subjects exposed to each of the treatments in each trial.
⩥ association. Answer: A pattern or relationship between two variables.
⩥ causal relationship. Answer: A relationship between two variables that
can be classified as cause-and-effect.
