Wgu c207 oa Data-Driven Decision Exam QUESTIONS
AND CORRECT ANSWERS| ACCURATE REAL EXAM
WITH FREQUENTLY TESTED QUESTIONS|ALREADY A
GRADED|GUARANTEED PASS|LATEST UPDATE 2025
Which level of measurement can be multiplied and divided? answers Ratio
Which level of measurement cannot be analyzed which most statistical test?
answers Nominal
Correlation is not _________ answers Causation
A good sample of the population being studied will be the right size and ___________
answers Random
If a sample is not random it creates ____________ answers Measurement Bias
If a sample is not the right size it creates ___________ answers Measurement Bias
Measuring the housing market in North Carolina when making an inference about the entire
East coast is an example of __________ answers Non-representative Sample
Lemonade sales increase when it is warmer than 75 degrees. Weather and lemonade are
__________ answers Correlated. "NOT CAUSE"
Pulling names from a hat is a tool to create a ______ sample answers Random
,Asking participants to taste test a yellow candy and a blue candy and select one can create bias.
How can we prevent bias? answers Blinding
You are taking a survey and the question is leading. It seams advantageous to answer a specific
way. What type of bias is this? answers Conscious KEYWORD: Benefit
A question is not leading, but you feel your boss might want you to answer a specific way
answers Response You feel there is an "expected" response and may not answer
honestly (no leading )
pread of the data answers Standard Deviation A normally distributed sample
spreads from -3 to +3 standard deviations from the mean
We should not use this measure of central tendency alone for decisions because it includes
outliers answers Mean
The best measure of central tendency when making decisions answers Median
We use this measure of central tendency if we want to know what happens the most
answers Mode (most can also be defined as typical or common)
If the mean is 50 and the standard deviation is 5, what is the probability of being between 45
and 55? answers 68.2% (of the sample will be within 1 standard deviation of the
mean) 50 - 5 = 45 and 50 + 5 + =55
What are the three probabilities of the bell curve? answers 68.2% 95.4% 99.7%
,68.2% of a sample will be within _______ standard deviation of the mean.
answers 1
95.4% of a sample will be within ______ standard deviations of the mean.
answers 2
99.7% of a sample will be within _____ standard deviations of the mean. answers 3
The mean is 20 and the standard deviation is 2, what is the probability of being between 14 and
26 answers 99.7% (of the sample will be within 3 standard deviations of the mean)
20 + 2 + 2 + 2 = 26 and 20 - 2 - 2 - 2 = 14
_______ can be used to differentiate between two samples with the same mean.
answers Variation
Which measurement can tell us where a single data point is on the bell curve?
answers 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? answers (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? answers (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? answers 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? answers 25% (1/4 = 0.25)
There is a 20% of parking close to the door and a 30% chance of getting the shopping cart with a
squeaky wheel. How do we calculated the probability of both events occurring?
answers Multiply Key Words: AND, ALL, BOTH
There is a 20% of parking close to the door and a 30% chance of getting the shopping cart with a
squeaky wheel. How do we calculated the probability of either event occurring?
answers Addition Key Words: OR, EITHER
Multiplying two events calculates an ____________ answers Intersection
Adding two events calculates a _______________ answers Union
The grocer is running a 10 for $10 special on cans of soup. You can mix and match the 5
different flavors of soup. You decide to purchase 10 cans. What can we use to count all the
possible outcomes of flavors picked? answers Combination
There is a 90% chance you will have to wait in line for more than 6 minutes to check out at the
grocer. What is the complement? answers 10%. If there is a 90% chance of yes,
then there is a 10% chance of no. 90% + 10% = 100%
AND CORRECT ANSWERS| ACCURATE REAL EXAM
WITH FREQUENTLY TESTED QUESTIONS|ALREADY A
GRADED|GUARANTEED PASS|LATEST UPDATE 2025
Which level of measurement can be multiplied and divided? answers Ratio
Which level of measurement cannot be analyzed which most statistical test?
answers Nominal
Correlation is not _________ answers Causation
A good sample of the population being studied will be the right size and ___________
answers Random
If a sample is not random it creates ____________ answers Measurement Bias
If a sample is not the right size it creates ___________ answers Measurement Bias
Measuring the housing market in North Carolina when making an inference about the entire
East coast is an example of __________ answers Non-representative Sample
Lemonade sales increase when it is warmer than 75 degrees. Weather and lemonade are
__________ answers Correlated. "NOT CAUSE"
Pulling names from a hat is a tool to create a ______ sample answers Random
,Asking participants to taste test a yellow candy and a blue candy and select one can create bias.
How can we prevent bias? answers Blinding
You are taking a survey and the question is leading. It seams advantageous to answer a specific
way. What type of bias is this? answers Conscious KEYWORD: Benefit
A question is not leading, but you feel your boss might want you to answer a specific way
answers Response You feel there is an "expected" response and may not answer
honestly (no leading )
pread of the data answers Standard Deviation A normally distributed sample
spreads from -3 to +3 standard deviations from the mean
We should not use this measure of central tendency alone for decisions because it includes
outliers answers Mean
The best measure of central tendency when making decisions answers Median
We use this measure of central tendency if we want to know what happens the most
answers Mode (most can also be defined as typical or common)
If the mean is 50 and the standard deviation is 5, what is the probability of being between 45
and 55? answers 68.2% (of the sample will be within 1 standard deviation of the
mean) 50 - 5 = 45 and 50 + 5 + =55
What are the three probabilities of the bell curve? answers 68.2% 95.4% 99.7%
,68.2% of a sample will be within _______ standard deviation of the mean.
answers 1
95.4% of a sample will be within ______ standard deviations of the mean.
answers 2
99.7% of a sample will be within _____ standard deviations of the mean. answers 3
The mean is 20 and the standard deviation is 2, what is the probability of being between 14 and
26 answers 99.7% (of the sample will be within 3 standard deviations of the mean)
20 + 2 + 2 + 2 = 26 and 20 - 2 - 2 - 2 = 14
_______ can be used to differentiate between two samples with the same mean.
answers Variation
Which measurement can tell us where a single data point is on the bell curve?
answers 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? answers (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? answers (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? answers 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? answers 25% (1/4 = 0.25)
There is a 20% of parking close to the door and a 30% chance of getting the shopping cart with a
squeaky wheel. How do we calculated the probability of both events occurring?
answers Multiply Key Words: AND, ALL, BOTH
There is a 20% of parking close to the door and a 30% chance of getting the shopping cart with a
squeaky wheel. How do we calculated the probability of either event occurring?
answers Addition Key Words: OR, EITHER
Multiplying two events calculates an ____________ answers Intersection
Adding two events calculates a _______________ answers Union
The grocer is running a 10 for $10 special on cans of soup. You can mix and match the 5
different flavors of soup. You decide to purchase 10 cans. What can we use to count all the
possible outcomes of flavors picked? answers Combination
There is a 90% chance you will have to wait in line for more than 6 minutes to check out at the
grocer. What is the complement? answers 10%. If there is a 90% chance of yes,
then there is a 10% chance of no. 90% + 10% = 100%
