Answer: I found the complete question:
A forecast is defined as a(n):
a. prediction of future values of a time series.
b. quantitative method used when historical data on the variable of interest are either unavailable or not
applicable.
c. set of observations on a variable measured at successive points in time.
d. outcome of a random experiment.
And the correct answer is "a. prediction of future values of a time series. ".
A forecast is defined as a prediction of future values of a time series.