Question: question 1 national scan inc sells ratio frequency inventory tags...
Question details
QUESTION 1

National Scan, Inc., sells ratio frequency inventory tags. Monthly sales for a 6month period were as follows:
Month:
Sales
Feb
47
Mar
51
Apr
56
May
59
Jun
58
Jul
63
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.
a) The Σty =
b) The Σy =
c) The value for the b (slope of the trend line) = (in 3 decimal places)
d) The value for the a (intercept of the trend line) = (in 3 decimal places)