AEA CERTIFICATION TEST QUESTIONS
AND 100% VERIFIED ANSWERS
Anomaly: What is it, and what does it mean? - ANSWER: Actual value minus
mean = off
The difference between a real value and an average number over a long period
What does linear regression mean? — ANSWER That line that fits the least
number of squared distances best. Shows how two factors are related.
Finds the equation of the line that connects the data points. It looks like this:
y=a+bx, where an is the y-intercept and b is the slope.
What does "multiple linear regression" mean? — ANSWER It looks at how
different variables that are not dependent on each other affect a single variable
that is dependent on them.
What does p-value mean? What does it mean if the p-value is higher than the set
limit (like 0.05 or 0.15)? What does this have to do with multiple linear
regression? — ANSWER p-value is the level of certainty (or "error"). The 0.05
p number is in the 95% confidence range, which means there is a 0.05% chance
of being wrong. For each term, the p-value checks how likely it is that the two
factors are linked.
When you do multiple regression, you should use linear regression, and you
should get rid of any data with an insignificant p value because it doesn't
necessarily change the trends.
What is difference? — ANSWER What the squared distance from the mean
should be
How far the numbers are spread out from the mean; also called dispersion.
What does normal distribution and standard deviation mean? — ANSWER
Different amounts of data are spread out, and the standard deviation shows how
far apart they are from the mean. 68.2% of the data is within one standard
, deviation, 95.4% within two standard deviations, and 99.6% within three
standard deviations.
How many people in the data set are within one plus or minus one standard
deviation? The answer is 68% of the data set.
What does a sensitivity study look at? — ANSWER Finding out how different
the model's independent factors are from one another. Guesses how sensitive the
model is to changes in various factors.
There is a measure that can be used for all variables, and you can make
predictions and compare variables.
9. Why would someone want to do a risk analysis? — ANSWER Want a
certain result and need to know which input number you need to change to get
that result.
To find the fastest and least expensive way to lower emissions if factors
changed by random, made-up amounts (like 90% more or 10% less),
What is a study of uncertainty? — ANSWER When using standard deviation,
which is based on how correct you think a variable is in the real world, SD may
change from variable to variable because you'd be less or more sure about
different things. Would use to figure out how sure you can be about your data
and the power of the independent factors to change the results.
What's the difference between an uncertainty analysis and a sensitivity analysis?
— ANSWER Uncertainty analysis uses standard deviations, which are real
numbers, while sensitivity analysis uses made-up percentages like 90% rise,
10% fall, etc.
In scientific writing, how do you write numbers? — ANSWER Put it in the
ones place (with a certain number of decimal points after it, like 2) and multiply
it by 10x, where x is the number you want to move the decimal point over.
Know the basic units of the metric system, such as the kilo, the hector, the deca,
the base, the decimal, the centi, and the mili, and how to write them in scientific
writing. — ANSWER Kilo = 1000 Hector = 100 Deca = 10 Base = 1 Deci =
0.1 Centi = 0.01 Mil = 0.001
AND 100% VERIFIED ANSWERS
Anomaly: What is it, and what does it mean? - ANSWER: Actual value minus
mean = off
The difference between a real value and an average number over a long period
What does linear regression mean? — ANSWER That line that fits the least
number of squared distances best. Shows how two factors are related.
Finds the equation of the line that connects the data points. It looks like this:
y=a+bx, where an is the y-intercept and b is the slope.
What does "multiple linear regression" mean? — ANSWER It looks at how
different variables that are not dependent on each other affect a single variable
that is dependent on them.
What does p-value mean? What does it mean if the p-value is higher than the set
limit (like 0.05 or 0.15)? What does this have to do with multiple linear
regression? — ANSWER p-value is the level of certainty (or "error"). The 0.05
p number is in the 95% confidence range, which means there is a 0.05% chance
of being wrong. For each term, the p-value checks how likely it is that the two
factors are linked.
When you do multiple regression, you should use linear regression, and you
should get rid of any data with an insignificant p value because it doesn't
necessarily change the trends.
What is difference? — ANSWER What the squared distance from the mean
should be
How far the numbers are spread out from the mean; also called dispersion.
What does normal distribution and standard deviation mean? — ANSWER
Different amounts of data are spread out, and the standard deviation shows how
far apart they are from the mean. 68.2% of the data is within one standard
, deviation, 95.4% within two standard deviations, and 99.6% within three
standard deviations.
How many people in the data set are within one plus or minus one standard
deviation? The answer is 68% of the data set.
What does a sensitivity study look at? — ANSWER Finding out how different
the model's independent factors are from one another. Guesses how sensitive the
model is to changes in various factors.
There is a measure that can be used for all variables, and you can make
predictions and compare variables.
9. Why would someone want to do a risk analysis? — ANSWER Want a
certain result and need to know which input number you need to change to get
that result.
To find the fastest and least expensive way to lower emissions if factors
changed by random, made-up amounts (like 90% more or 10% less),
What is a study of uncertainty? — ANSWER When using standard deviation,
which is based on how correct you think a variable is in the real world, SD may
change from variable to variable because you'd be less or more sure about
different things. Would use to figure out how sure you can be about your data
and the power of the independent factors to change the results.
What's the difference between an uncertainty analysis and a sensitivity analysis?
— ANSWER Uncertainty analysis uses standard deviations, which are real
numbers, while sensitivity analysis uses made-up percentages like 90% rise,
10% fall, etc.
In scientific writing, how do you write numbers? — ANSWER Put it in the
ones place (with a certain number of decimal points after it, like 2) and multiply
it by 10x, where x is the number you want to move the decimal point over.
Know the basic units of the metric system, such as the kilo, the hector, the deca,
the base, the decimal, the centi, and the mili, and how to write them in scientific
writing. — ANSWER Kilo = 1000 Hector = 100 Deca = 10 Base = 1 Deci =
0.1 Centi = 0.01 Mil = 0.001
