DATA DRIVEN DECISION MAKING COMPREHENSIVE EXAM SCRIPT COMPLETE QUESTIONS
VERIFIED SOLUTIONS
Question:
68.2% of a sample will be within _______ standard deviation of the mean.
Answer:
1
Question:
95.4% of a sample will be within ______ standard deviations of the mean.
Answer:
2
Question:
99.7% of a sample will be within _____ standard deviations of the mean.
Answer:
3
Question:
The mean is 20 and the standard deviation is 2, what is the probability of being between 14 and 26
Answer:
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
Question:
,_______ can be used to differentiate between two samples with the same mean.
Answer:
Variation
Question:
Which measurement can tell us where a single data point is on the bell curve?
Answer:
z-score. (Tip: Remember z for me. Where are you in the curve of your peers)
Question:
You want to know how your height compares to all of your family tree. How do you calculate a z
score?
Answer:
(Your height - the mean of the family tree height) divided by the standard deviation of the family
tree height (me-mean)/standard deviaiton
Question:
You are 63" tall and the family tree averages 67" with a standard deviation of 2". What is your
z-score?
Answer:
(63-67)/2 = -2 You are 2 standard deviations shorter than the family tree.
Question:
Which measure lets you measure your height compared to your maternal family tree and your height
compared to your paternal family tree?
Answer:
z-scores let us measure two samples by putting them to the same scale.
, Question:
There are four shopping carts available and one has a broken wheel. What is your probability of
selecting the cart with the broken wheel?
Answer:
25% (1/4 = 0.25)
Question:
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?
Answer:
Multiply Key Words: AND, ALL, BOTH
Question:
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?
Answer:
Addition Key Words: OR, EITHER
Question:
Multiplying two events calculates an ____________
Answer:
Intersection
Question:
Adding two events calculates a _______________
Answer:
Union
VERIFIED SOLUTIONS
Question:
68.2% of a sample will be within _______ standard deviation of the mean.
Answer:
1
Question:
95.4% of a sample will be within ______ standard deviations of the mean.
Answer:
2
Question:
99.7% of a sample will be within _____ standard deviations of the mean.
Answer:
3
Question:
The mean is 20 and the standard deviation is 2, what is the probability of being between 14 and 26
Answer:
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
Question:
,_______ can be used to differentiate between two samples with the same mean.
Answer:
Variation
Question:
Which measurement can tell us where a single data point is on the bell curve?
Answer:
z-score. (Tip: Remember z for me. Where are you in the curve of your peers)
Question:
You want to know how your height compares to all of your family tree. How do you calculate a z
score?
Answer:
(Your height - the mean of the family tree height) divided by the standard deviation of the family
tree height (me-mean)/standard deviaiton
Question:
You are 63" tall and the family tree averages 67" with a standard deviation of 2". What is your
z-score?
Answer:
(63-67)/2 = -2 You are 2 standard deviations shorter than the family tree.
Question:
Which measure lets you measure your height compared to your maternal family tree and your height
compared to your paternal family tree?
Answer:
z-scores let us measure two samples by putting them to the same scale.
, Question:
There are four shopping carts available and one has a broken wheel. What is your probability of
selecting the cart with the broken wheel?
Answer:
25% (1/4 = 0.25)
Question:
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?
Answer:
Multiply Key Words: AND, ALL, BOTH
Question:
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?
Answer:
Addition Key Words: OR, EITHER
Question:
Multiplying two events calculates an ____________
Answer:
Intersection
Question:
Adding two events calculates a _______________
Answer:
Union
