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Last year the mean cost μ for a one-bedroom rental in a certain city was $1,200 per month. Eli is looking for a one-bedroom apartment and is investigating whether the mean cost is less now than what it was last year. A random sample of apartments had a sample mean x¯ of $1,180 per month. Assuming all conditions for inference are met, Eli will conduct a hypothesis test as part of his investigation.

Respuesta :

Answer:

The person above is incorrect, I got that answer wrong on AP classroom, it is actually B

Step-by-step explanation:

B is correct on AP CLASSROOM

Hypothesis is the assumption about a population parameter.The correct set of the hypothesis is,

[tex]H_0: \overline x= 1200\\ H_a:\overline x<1200[/tex]

The option B is the correct option.

Given-

The rental cost of one bedroom is $1200 per month.

A random sample of apartments had a sample mean [tex]x^-[/tex] of $1,180 per month.

Hypothesis

Hypothesis is the assumption about a population parameter.

As Eli is looking for a bedroom whose cost is below the $1200.The null hypothesis is the hypothesis of the statement being true in order to decide weather it should be accept or reject. Thus the null hypothesis for the given problem is equal to the last year price,

[tex]H_0: \overline x= 1200[/tex]

Now the rental price must be less that the $1200. Thus alternative hypothesis is given by using the less than sign. Hence,

[tex]H_a:\overline x<1200[/tex]

The correct set of the hypothesis is,

[tex]H_0: \overline x= 1200\\ H_a:\overline x<1200[/tex]

The option B is the correct option.

Learn more about the hypothesis here;

https://brainly.com/question/2695653

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