|Hypothesis 1:|The coefficient on GDP is negative.|
|Hypothesis 2:|The intercept term is equal to –4.|
|Hypothesis 3:|A 2.6% increase in the CPI will result in an increase in sales of more than 12.0%.|
|Hypothesis 4:|A 1% increase in industrial production will result in a 1% decrease in sales.|
Can someone explain why Hypotheses 1 is a one tailed test? i thought it would be = or =/ to negative so that would be a two tailed test?