Chapter 2.01 Describing Time Series Plots

Which one of the following statement BEST describes the time series plot for the period shown?

• It shows no trend and no change in variability

• It shows increasing linear trend with constant variability

• It shows increasing trend with decreasing variability

• It shows increasing linear trend with increasing variability

The time series plot has

• no trend

• seasonality only

• an increasing trend with seasonality

• an increasing trend only

A time series for the weight of a baby is most likely to have

• a positive secular trend

• a negative secular trend

• a cyclic pattern

Which of the following is most likely to apply to the time series plot below?

• a positive secular trend

• a seasonal variation

• a cyclic pattern

• a random variation

The sales of a new popular ice-cream flavour in a beach resort. Choose the true statement.

• positive secular trend

• seasonal pattern

• cyclic pattern

• random pattern

The number of daily births in a particular country hospital over a period of 10 days.

• negative secular trend

• seasonal pattern

• cyclic pattern

• random pattern

Which components listed in the time series plot is most likely to apply?

• positive secular trend

• seasonal pattern

• cyclic pattern

• random pattern

Which of the components listed in the time series plot is most applicable?

• positive secular trend

• negative secular trend

• seasonal pattern

• random pattern

Which components listed is most applicable to time series plot below?

• negative secular trend

• positive secular trend

• cyclic pattern

• seasonal pattern

Determine the period for the time series plot below

• periods of 6 days

• periods of 7 days

• periods of 5 days

• periods of 8 days