National Scan, Inc, sells ratio frequency inventory tags. Monthly sales for a 6-

Question

National Scan, Inc, sells ratio frequency inventory tags. Monthly sales for a 6-month period were as follows: Month: Disregard the demand pattern of the given time series, You are asked to use the time series to derive a trend equation In order to derive the trend equation is F_t = a + bt. you have to compute several components to compute the values for the variables a and b Answer the following questions pertaining to information that are relevant to deriving the trend equation The sigma ty The sigma y The value for the b (slope of the trend line) = (in 3 decimal places). The value for the a (intercept of the trend line) = (in 3 decimal places)

Explanation / Answer

Sol)

c) The equation is

From Excel

slope=1.14

intercept=9.19

t y ty 2 11 22 3 13 39 4 13 52 5 17 85 6 15 90 7 17 119 sum= 86 407

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