)In Which Case Would Testing the Null Hypothesis Involve a Two-Tailed

Multiple Choice

) In which case would testing the null hypothesis involve a two-tailed statistical test?

A) H₁: Incentive pay for teachers does affect student achievement
B) H₁: Higher sales tax rates does not reduce state tax revenues
C) H₁: Extending the duration of unemployment benefits does not increase the length of joblessness
D) H₁: Smoking does not reduce life expectancy