# Thread: calculate the value of the appropriate test statistic?

1. ## calculate the value of the appropriate test statistic?

calculate the value of the appropriate test statistic?
I have worked p-value and it is 0.23
can anyone help me with test value?
thanks

2. ## Re: calculate the value of the appropriate test statistic?

which formula i need to use and which values?

3. ## Re: calculate the value of the appropriate test statistic?

considering it is chi-squared distribution

4. ## Re: calculate the value of the appropriate test statistic?

if I use this formula

what would be E?

5. ## Re: calculate the value of the appropriate test statistic?

Assuming you are conducting this test:

http://en.wikipedia.org/wiki/Pearson...f_independence

So you just need to follow the equation there - those will be the expected frequency under the null hypothesis (independence).

6. ## Re: calculate the value of the appropriate test statistic?

i still couldnet get it

7. ## Re: calculate the value of the appropriate test statistic?

In your example, 30% of the sample are sub-standard (150 out of total 500 cases).
AND 20% are rural (100 out of 500).

The question is, how many cases would you expect (E) for the combination
sub-standard & rural, if assessment and location were completely unrelated?
It would be the proportion of the total sample given by 0.30 x 0.20 = 0.06.
Therefore, in that cell one would expect 6% of 500 = 30 cases.

One does this calculation for every cell and can then use the formula containing
"observed" and "expected" values.

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