Question

If the alternate hypothesis of an experiment is “The true mean height of the giraffes is more than 15 feet” what is the null hypothesis?

Answer 1

Answer: "The true mean height of the giraffes is less than or equal to 15 feet".

Step-by-step explanation:

A hypothesis in a statement that is made about a statistical parameter of a population.

A null hypothesis $H_0$ is usually the hypothesis that is tried to reject by an alternate hypothesis $H_a$

In this case  $H_a$ is:

"The true mean height of the giraffes is more than 15 feet".

Therefore, for this case, the null hypothesis must be:

 "The true mean height of the giraffes is less than or equal to 15 feet".