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What is an example of a Univariate time series?
- Hour by hour temperature
- Baseball scores
- Fashion items
- Hour by hour weather
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What is an example of a Multivariate time series?
- Fashion items
- Hour by hour weather
- Hour by hour temperature
- Baseball scores
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What is imputed data?
- A projection of unknown (usually past or missing) data
- A bad prediction of future data
- Data that has been withheld for various reasons
- A good prediction of future data
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A sound wave is a good example of time series data
- False
- True
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What is Seasonality?
- Weather data
- Data that is only available at certain times of the year
- A regular change in shape of the data
- Data aligning to the 4 seasons of the calendar
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What is a trend?
- An overall consistent downward direction for data
- An overall direction for data regardless of direction
- An overall consistent upward direction for data
- An overall consistent flat direction for data
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In the context of time series, what is noise?
- Unpredictable changes in time series data
- Data that doesn’t have a trend
- Data that doesn’t have seasonality
- Sound waves forming a time series
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What is autocorrelation?
- Data that automatically lines up in trends
- Data that doesn’t have noise
- Data that automatically lines up seasonally
- Data that follows a predictable shape, even if the scale is different
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What is a non-stationary time series?
- One that moves seasonally
- One that has a disruptive event breaking trend and seasonality
- One that is consistent across all seasons
- One that has a constructive event forming trend and seasonality