The quarterly earnings (in $millions) of a large soft-drink manufacturer have been recorded for the years 20132016.

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The quarterly earnings (in $millions) of a large soft-drink manufacturer have been recorded for the years 2013€“2016. These data are listed here. Compute the seasonal indexes given the regression line

ŷ = 61.75 + 1.18 t (t = 1, 2, . . . , 16)

 Year Quarter 2013 2014 2015 2016 52 57 66 67 75 77 82 94 3 85 90 98 4 54 61 63 67


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