The data file Product Sales shows 24 annual observations on sales of a product. Use simple exponential smoothing with smoothing constant α = 0.5 to obtain forecasts of sales for the next 3 years.
Answer to relevant QuestionsRefer to the data file Quarterly Earnings. Use the Holt-Winters seasonal method with smoothing constants α = 0.6, β = 0.6, and γ = 0.8 to obtain forecasts of this earnings-per-share series for the next four quarters. Using the data in the file Macro2010 develop an autoregressive model for fixed investment. First, use the data for the period 1965, first quarter, through 2000, fourth quarter, to forecast for the quarters in years ...A small town contains a total of 1,800 households. The town is divided into three districts, containing 820, 540, and 440 households, respectively. A stratified random sample of 300 households contains 120, 90, and 90 ...A market-research organization wants to estimate the mean amounts of time in a week that television sets are in use in households in a city that contains 65 precincts. A simple random sample of 10 precincts was selected, and ...Carefully explain the distinction between stratified random sampling and cluster sampling. Provide illustrations of sampling problems where each of these techniques might be useful.
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