Answer:
The alternative hypothesis is: [tex]H_a:\mu_{new}-\mu_{old}\neq0[/tex]
Step-by-step explanation:
Consider the provided information.
If there is no statistical significance in the test then it is know as the null which is denoted by [tex]H_0[/tex], otherwise it is known as alternative hypothesis which denoted by [tex]H_a[/tex].
A company is researching the effectiveness of a new website design to decrease the time to access a website.
The null hypothesis is there is no difference between new and old times.
[tex]H_0:\mu_{new}-\mu_{old}=0[/tex]
Thus, the alternative hypothesis is: [tex]H_a:\mu_{new}-\mu_{old}\neq0[/tex]