To select a value for a for exponential smoothing:
a) use a small a when the series varies substantially.
b) use a large a when the series has little random variability.
c) use a value between 0 and 1 All of the alternatives are true.

c) use a value between 0 and 1

Explanation:

Exponential smoothing is a method of estimating a sequence of successive numerical data points for a one variable data. It can support data with seasonal attributes.

Exponential smoothing can be used make weather forecasts or presentations.

It makes sure that any irregularities in a time series data is removed so as to ensure that correct weather forecasts are been given or predicted.

b exhibiting favoritism toward the kikuyu people.