WGU C955 APPLIED PROBABILITY AND
STATISTICS EXAM PREP 2026 PROBABILITY
THEORY AND INFERENTIAL STATISTICS
OVERVIEW
◉ Two employees, Smith and Jones, had first quarterly sales of
$50,000 and $60,000, respectively. The graph below depicts this
information:
{{
Y=Thousands of Dollars, going from 40 to 100 in increments of 10
X= Smith Jones
Smith = 50
Jones = 60
}}
What is true about this graph's depiction of the data?
A) The graph reflects the results perfectly.
B) The graph misrepresents the data by starting the vertical axis at
40, making it seem that Jones had twice Smith's sales.
,C) The graph misrepresents the data by using different colors for the
bars that show Smith's and Jones's sales.
D) The graph misrepresents the data by including values on the
vertical axis as high as 100 when neither Smith nor Jones had sales
that high.
Answer: The graph misrepresents the data by starting the vertical
axis at 40, making it seem that Jones had twice Smith's sales.
◉ The chart below shows the population of Texas from 1900
through 2000 (in millions of people):
{{
Y=Texas Population in millions, going from 0 to 25 in increments of
5
X=1900 1960 1970 1980 1990 2000
}}
Why is this graph a misleading representation of this data?
A) Rounding to the nearest million distorts the true values.
B) The horizontal scale is uneven.
C) The vertical scale is uneven.
D) The x-axis and y-axis should be reversed.
,Answer: The horizontal scale is uneven.
◉ A study was conducted to see if blood type influenced height.
Which type of classification is this?
A) Categorical to categorical
B) Categorical to quantitative
C) Quantitative to quantitative
D) Quantitative to categorical
Answer: Categorical to quantitative
◉ A study was conducted on the possible relationship between
smoking status and whether or not alcohol is consumed.
Which type of classification is this?
A) Categorical to categorical
B) Quantitative to categorical
C) Categorical to quantitative
D) Quantitative to quantitative
Answer: Categorical to categorical
, ◉ A study is conducted on the possible relationship between gender
and income of the employees at a marketing company.
Which numerical measure is appropriate for this study?
A) Standard deviation
B) Five-number summary
C) Conditional percentages
D) Correlation coefficient
Answer: Five-number summary
◉ A researcher is examining the relationship between the number of
hours of sleep and score on a cognitive test.
Which method should be used to measure the linear relationship
between these two variables?
A) Correlation
B) Proportion
C) Quartile
D) Standard deviation
STATISTICS EXAM PREP 2026 PROBABILITY
THEORY AND INFERENTIAL STATISTICS
OVERVIEW
◉ Two employees, Smith and Jones, had first quarterly sales of
$50,000 and $60,000, respectively. The graph below depicts this
information:
{{
Y=Thousands of Dollars, going from 40 to 100 in increments of 10
X= Smith Jones
Smith = 50
Jones = 60
}}
What is true about this graph's depiction of the data?
A) The graph reflects the results perfectly.
B) The graph misrepresents the data by starting the vertical axis at
40, making it seem that Jones had twice Smith's sales.
,C) The graph misrepresents the data by using different colors for the
bars that show Smith's and Jones's sales.
D) The graph misrepresents the data by including values on the
vertical axis as high as 100 when neither Smith nor Jones had sales
that high.
Answer: The graph misrepresents the data by starting the vertical
axis at 40, making it seem that Jones had twice Smith's sales.
◉ The chart below shows the population of Texas from 1900
through 2000 (in millions of people):
{{
Y=Texas Population in millions, going from 0 to 25 in increments of
5
X=1900 1960 1970 1980 1990 2000
}}
Why is this graph a misleading representation of this data?
A) Rounding to the nearest million distorts the true values.
B) The horizontal scale is uneven.
C) The vertical scale is uneven.
D) The x-axis and y-axis should be reversed.
,Answer: The horizontal scale is uneven.
◉ A study was conducted to see if blood type influenced height.
Which type of classification is this?
A) Categorical to categorical
B) Categorical to quantitative
C) Quantitative to quantitative
D) Quantitative to categorical
Answer: Categorical to quantitative
◉ A study was conducted on the possible relationship between
smoking status and whether or not alcohol is consumed.
Which type of classification is this?
A) Categorical to categorical
B) Quantitative to categorical
C) Categorical to quantitative
D) Quantitative to quantitative
Answer: Categorical to categorical
, ◉ A study is conducted on the possible relationship between gender
and income of the employees at a marketing company.
Which numerical measure is appropriate for this study?
A) Standard deviation
B) Five-number summary
C) Conditional percentages
D) Correlation coefficient
Answer: Five-number summary
◉ A researcher is examining the relationship between the number of
hours of sleep and score on a cognitive test.
Which method should be used to measure the linear relationship
between these two variables?
A) Correlation
B) Proportion
C) Quartile
D) Standard deviation
