Which of these is not necessarily true of a time series?
AI Tech Trainee module 3

Quiz
•
Professional Development
•
Professional Development
•
Hard
Fabian Stadler
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Time series data are taken in equally spaced points in time
Time series data can be ordered by time
Time series data are a special type of financial data
Time series data are quantitative
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not a result of time series decomposition?
Trend
Cyclical component
Seasonality
Residuals
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In time series, 'taking a lag of a time series' means looking at how well are we able to predict past data.
True
False
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What can we learn by calculating autocorrelations?
How closely related are two different time series
How much do the residuals of different periods vary around the mean
How closely related is a time series with some lag of itself
How much more seasonality there is in the time series relative to how much trend there is
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which one of these is not a condition for a time series to be stationary?
Constant mean
Constant variance (homoskedasticity)
No seasonality
Small residuals
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do we call the group of very simple models:
Easy models
Simpletons
Naïve models
Average models
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Time series model components can be usually decomposed using an additive or multiplicative approach.
True
False
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