1. A seasonal index value of 87.5 indicates that the value for that calendar period is typically
12.5% below the trend
12.5% below the previous period's value
87.5 units above the previous period's value
87.5 units above the trend
2. A moving average is applied to a time series of data to
remove the effect of seasonality and cycles
highlight the effect of seasonality
remove the trend from the series
identify the time series period