# stats: hypothesis

• Dec 15th 2008, 08:40 PM
comet2000
stats: hypothesis
Express the null hypothesis Ho and the alternative hypothesis H1 in symbolic form. use the correct symbol (μ, p, σ) for the indicated parameter.

Carter motor company claims that its new sedan, the libra will average better than 25 miles per gallon in the city.
use μ, the true average mileage of the libra.

how do i solve it?
• Dec 15th 2008, 08:49 PM
Chris L T521
Quote:

Originally Posted by comet2000
Express the null hypothesis Ho and the alternative hypothesis H1 in symbolic form. use the correct symbol (μ, p, σ) for the indicated parameter.

Carter motor company claims that its new sedan, the libra will average better than 25 miles per gallon in the city.
use μ, the true average mileage of the libra.

how do i solve it?

Well,

$H_0:~\mu=25$
$H_1:~\mu>25$

So you will be performing a right tailed test.

What's your level of significance, $\alpha$? This is needed to find the critical region!!

Also, it seems that some information is missing. Do you know anything about a possible sample [i.e. mean mpg and standard deviation for a certain number of cars] ?
• Dec 15th 2008, 09:09 PM
comet2000
Quote:

Originally Posted by Chris L T521
Well,

$H_0:~\mu=25$
$H_1:~\mu>25$

So you will be performing a right tailed test.

What's your level of significance, $\alpha$? This is needed to find the critical region!!

Also, it seems that some information is missing. Do you know anything about a possible sample [i.e. mean mpg and standard deviation for a certain number of cars] ?

that's all it says on the paper.

thank you.
• Dec 15th 2008, 09:12 PM
Chris L T521
Quote:

Originally Posted by comet2000
that's all it says on the paper.

thank you.

Woops...misread the problem...its just asking for the null and alternate hypothesis. What I posted in my first response is all you need then. Disregard what I said about $\alpha$, critical values, and the like. (Nod)
• Dec 15th 2008, 09:21 PM
comet2000
Quote:

Originally Posted by Chris L T521
Woops...misread the problem...its just asking for the null and alternate hypothesis. What I posted in my first response is all you need then. Disregard what I said about $\alpha$, critical values, and the like. (Nod)

hehe, ok. for a moment there, i was a bit confuse.

Thank You Very Much. (Nod)