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# Find the critical value or values of x2 based on the given

### Resolved Question:

Find the critical value or values of x2 based on the given information.

H1: s ? 9.3
n = 28
a = 0.05
Submitted: 6 years ago.
Category: Math Homework
Expert:  abozer replied 6 years ago.

abozer :

Hi,

abozer :

One of the symbols is missing.

abozer :

Is it H1: s ≠ 9.3 ?

abozer :

or H1: s > 9.3

abozer :

or

abozer :

H1: s < 9.3

abozer :

which one?

Customer :

H1: σ ≠ 9.3

abozer :

ok.

abozer :

This is a two tailed test.

Customer :

yes

abozer :

degree of freedom = n - 1

abozer :

= 28 - 1

abozer :

= 27

abozer :

We need to use a chi-square table to find the critical points with degree of freedom 27.

Customer :

a. -40.113, 40.113

• b. 16.151, 40.113
• c. -14.573, 14.573
• d. 14.573, 43.194

• abozer :

The area under the curve of chi-square distribution on the left tail is 0.025 and the one on the right will also be 0.025.

abozer :

The one on the right is 43.194.

abozer :

The one on the left is 14.573

abozer :

The correct choice is d.

Customer :

thanks!!!!!!!!!

abozer :

you're welcome.