WGU C207 OA Data Driven Decision Making
Latest EXAM NEW 2026/2027 ( REAL EXAM)
100%|SOLVED A+ Graded
Which measurement can tell us where a single data point is on the bell curve?
z-score. (Tip: Remember z for me. Where are you in the curve of your peers)
You want to know how your height compares to all of your family tree. How do you
calculate a z score?
(Your height - the mean of the family tree height) divided by the standard deviation of
the family tree height (me-mean)/standard deviaiton
You are 63" tall and the family tree averages 67" with a standard deviation of 2". What
is your z-score?
(63-67)/2 = -2 You are 2 standard deviations shorter than the family tree.
Which measure lets you measure your height compared to your maternal family tree
and your height compared to your paternal family tree?
z-scores let us measure two samples by putting them to the same scale.
There are four shopping carts available and one has a broken wheel. What is your
probability of selecting the cart with the broken wheel?
25% (1/4 = 0.25)
Not selecting a random sample is what type of bias?
Measurement
Name the 4 levels of measurement
(NOIR) Nominal, Ordinal, Interval Ratio
,Continuous data with unique zero point is _______ level of measurement.
Ratio
Orders data at equal distance apart is _______ level of measurement.
Interval
Identify, Group, or Categorize is _______ level of measurement.
Nominal
This error repeats itself
Systematic Error - Skewed results
Observation points that are distant from other observations.
Outliers Note: Can be included or excluded in analysis (causes skewness)
Types of Bias: Bias that occurs from not selecting a random sample
Measurement bias
Types of Bias: Bias introduced because respondents believe it will be beneficial if
selected.
Conscious bias (key word: benefit)
Consistent and repeatable data
Reliable
Resulting from accurate measurements
Valid data
If a responder lies on their survey, this creates what type of bias?
Information
Sorting your spreadsheet can expose these errors by moving them to the very top or
the very bottom of the column
Omission or Out-of-Range
, An error that will fix itself over time
Random
An error that will not fix itself. You must do something
Systematic
Cleaning and organizing data
Data Management
Are the following variable quantitative or qualitative? Personality type, social class, or
communication style
Qualitative
A study used when you a conditions can't be controlled
Observational study
Observes people going forward in time from the time of their entry into the study.
Cohort Study
What are the three elements of an experimental study?
Unit, Treatment, Response
Accurately measures what it is intended to measure
Valid data
________ an experimental study prevents bias.
Blinding
The colors of cars is which level of measurement?
Nominal
The price of the car is which level of measurement?
Ratio
Which level of measurement can be multiplied and divided?
Latest EXAM NEW 2026/2027 ( REAL EXAM)
100%|SOLVED A+ Graded
Which measurement can tell us where a single data point is on the bell curve?
z-score. (Tip: Remember z for me. Where are you in the curve of your peers)
You want to know how your height compares to all of your family tree. How do you
calculate a z score?
(Your height - the mean of the family tree height) divided by the standard deviation of
the family tree height (me-mean)/standard deviaiton
You are 63" tall and the family tree averages 67" with a standard deviation of 2". What
is your z-score?
(63-67)/2 = -2 You are 2 standard deviations shorter than the family tree.
Which measure lets you measure your height compared to your maternal family tree
and your height compared to your paternal family tree?
z-scores let us measure two samples by putting them to the same scale.
There are four shopping carts available and one has a broken wheel. What is your
probability of selecting the cart with the broken wheel?
25% (1/4 = 0.25)
Not selecting a random sample is what type of bias?
Measurement
Name the 4 levels of measurement
(NOIR) Nominal, Ordinal, Interval Ratio
,Continuous data with unique zero point is _______ level of measurement.
Ratio
Orders data at equal distance apart is _______ level of measurement.
Interval
Identify, Group, or Categorize is _______ level of measurement.
Nominal
This error repeats itself
Systematic Error - Skewed results
Observation points that are distant from other observations.
Outliers Note: Can be included or excluded in analysis (causes skewness)
Types of Bias: Bias that occurs from not selecting a random sample
Measurement bias
Types of Bias: Bias introduced because respondents believe it will be beneficial if
selected.
Conscious bias (key word: benefit)
Consistent and repeatable data
Reliable
Resulting from accurate measurements
Valid data
If a responder lies on their survey, this creates what type of bias?
Information
Sorting your spreadsheet can expose these errors by moving them to the very top or
the very bottom of the column
Omission or Out-of-Range
, An error that will fix itself over time
Random
An error that will not fix itself. You must do something
Systematic
Cleaning and organizing data
Data Management
Are the following variable quantitative or qualitative? Personality type, social class, or
communication style
Qualitative
A study used when you a conditions can't be controlled
Observational study
Observes people going forward in time from the time of their entry into the study.
Cohort Study
What are the three elements of an experimental study?
Unit, Treatment, Response
Accurately measures what it is intended to measure
Valid data
________ an experimental study prevents bias.
Blinding
The colors of cars is which level of measurement?
Nominal
The price of the car is which level of measurement?
Ratio
Which level of measurement can be multiplied and divided?
