Question: n a regression model with sales as the dependent variable, the parameter estimates for quarterly dummy variables are not significantly different from zero. This suggests

n a regression model with sales as the dependent variable, the parameter estimates for quarterly dummy variables are not significantly different from zero. This suggests that:

Select one:

a.There is a positive trend

b.There are no dummy variables

c.There is positive Autocorrelation

d.There are no seasonal effects

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