Answer: 2. H0: μ = 40 vs. H1: μ < 40
Step-by-step explanation:
Let [tex]\mu[/tex] be the average number of tissues a person uses during the course of a cold.
Given : Researchers claim that 40 tissues is the average number of tissues a person uses during the course of a cold.
i.e. [tex]\mu=40[/tex]
The company who makes Puffs brand tissues thinks that fewer of their tissues are needed.
i.e. [tex]\mu<40[/tex]
Thus , the set of hypothesis would be :-
[tex]H_0: \mu=40[/tex]
[tex]H_a: \mu<40[/tex]
Thus , the correct answer is option 2. H0: μ = 40 vs. H1: μ < 40