In ratio to moving average method for seasonal indices, the ratio of an observed value to the moving average measure the influence of _________. a. both trend and cyclical variation b. both seasonal and irregular variation c. cyclical variation d. trend

For a monthly time series with a strong seasonal pattern, which of the following moving averages should be used to estimate the trend?Group of answer choicesa centred 11-point moving averagea 12-point moving averagea 2x12-point moving averagea centred 13-point moving average

The moving averages and exponential smoothing methods are appropriate for a time series exhibiting _____.Group of answer choicesa cyclical patterna horizontal patterntrendsseasonal effects

What is the difference between a trend, a cycle and a seasonal pattern? (30–100 words)

State the conditions under which the Moving Average method can be recommended for trend analysis. How will you determine the period of the moving average?

Which of the following time series components is associated with long-term movement in the data?a.Trendb.Seasonalityc.Cyclicald.RandomClear my choice