Time Series Test 1 (Quiz Questions) With Actual Correct Answers 100% Verified.

What does the Autocorrelation Function (ACF) primarily measure in time series data? - correct answer the linear relationship between lagged values of the series Which of the following is a characteristic of a white noise series? a.) increasing variance over time b.) periodic patterns or seasonality c.) constant mean and variance over time d.) a clear increasing or decreasing trend - correct answer a.) Increasing variance over time Which component of a time series represents the regular pattern that occurs due to specific calendar-related events? a.) irregular b.) cyclical c.) seasonal d.) trend - correct answer c.) seasonal What is the primary use of moving averages in time series analysis? - correct answer To highlight long-term trends by smoothing out short-term fluctuations In the context of ACF, what does a 'lag' refer to? - correct answer The time interval between successive observations Which statement is true for a white noise time series? a.) it is predictable b.) it shows no autocorrelation c.) to has a strong seasonal component - correct answer b.) it shows no autocorrelation What does the decomposition of a time series involve? - correct answer Separating the time series into trend, seasonal, and irregular components What is the purpose of making seasonal adjustments to a time series? - correct answer to remove or reduce the influence of seasonal effects What distinguishes the cyclical component from the seasonal component in a time series? (first quiz video) - correct answer How is a weighted moving average different from a simple moving average? (first quiz video) - correct answer Which component is not a part of Classical Decomposition? a.) cyclical b.) exponential c.) trend d.) seasonal - correct answer b.) exponential STL stands for: - correct answer Seasonal-Trend Decomposition using Loess What does the X-11 method include? a.) only multiplicative decomposition b.) only additive decomposition c.) neither additive nor multiplicative decomposition d.) both additive and multiplicative decomposition - correct answer d.) both additive and multiplicative decomposition In Classical Decomposition, the trend component is usually estimated by: - correct answer moving averages What is the main purpose of seasonal adjustment in time series analysis? - correct answer to remove the effect of seasonality What is the STL decomposition used for? - correct answer to measure the strength of seasonality and trend What does ACF stand for in the context of time series analysis? - correct answer autocorrelation function Which of the following is not a feature calculated by the "feat_stl()" func