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STATS Assignment 7 Review chapter 16.5 Question

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Question;Assignment 7Review chapter 16.5 (pp. 216-222) and answer the following questions.The quarterly sales data (number of book sold) for Christian book over the past three years in Californiafollow: (You can use Excel to compute the equation)Quarter1234Year1169094026252500Year2180090029002360Year318501100293026151. Construct a time series plot. What type of pattern exists in the data?2. Use the following dummy variables to develop an estimated regression equation to account forany seasonal effects in the data: Quarter1=1 if the sales data point is in Quarter 1, otherwiseQuarter 1=0, Quarter 2=1 if the sales data point is in Quarter 2, otherwise, Quarter 2=0, Quarter3=1 if the sales data point is in Quarter 3, otherwise Quarter 3=0.3. Compute the quarterly forecasts for next year.4. Let t=1 to refer to the observation in quarter 1 of year 1, t=2 to refer to the observation in quarter2 of year 1,,,,,and t=12 to refer to the observation in quarter 4 of year 3. Using the dummyvariables defined in part (b) and t, develop an estimated regression equation to account forseasonable effects and any linear trend in the time series. Based upon the seasonal effects in thedata and linear trend, compute the quarterly forecasts for next year.5. This is an open-ended essay question. Based on the result in 4, what factors might lead to thehighest Christian book sales in quarter 3? You may quote bible verses in 2 Corinthians 9:10 orColossians 1:10.

 

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