Question

Three years of monthly lawn-maintenance expenses ($) for a six-unit apartment house in southern Florida follow.
a. Construct a time series plot. What type of pattern exists in the data?
b. Identify the monthly seasonal indexes for the three years of lawn-maintenance expenses for the apartment house in southern Florida as given here. Use a 12-month moving average calculation.
c. Deseasonalize the time series.
d. Compute the linear trend equation for the deseasonalized data.
e. Compute the deseasonalized trend forecasts and then adjust the trend forecasts using the seasonal indexes to provide a forecast for monthly expenses in year 4.


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  • CreatedSeptember 20, 2015
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