Which of the Following Best Describes a Time Series

Multiple Choice

Which of the following best describes a time series?

A) A time series is a set of measurements on a variable collected at the same time.
B) A time series is a set of measurements on a variable taken over some time period in sequential order.
C) A time series is a model that attempts to analyze the relationship between a dependent variable and one or more independent variables.
D) A time series is a model that attempts to forecast the future value of a variable.