A Company Is Researching the Effectiveness of a New Website $\pm$

Multiple Choice

A company is researching the effectiveness of a new website design to decrease the time to access a website. Five website users were randomly selected, and their times (in seconds) to access the website with the old and new designs were recorded. To compare the times, they computed (new website design time - old website design time) . The results follow:
What are the null and alternative hypothesis?

A) H₀: µ_d = 0; H₁: µ_d $\pm$ 0
B) H₀: µ_d $\pm$ 0; H₁: µ_d = 0
C) H₀: µ_d $\neq$ 0; H₁: µ_d > 0
D) H₀: µ_d $\ge$ 0; H₁: µ_d $\neq$ 0
E) H₀: µ_d $\ge$ 0; H₁: µ_d < 0