Help needed for upcoming exam: Chi square

stephaniemlarsen

New Member
Okay...I have calculated my chi square with an answer of 8.33. No alpha is specified (so Im assuming it would be stated as 0.05). Degrees of freedom is 1

Question 1: How do I know what the p value is from this information
question 2: what does 8.33 mean? does this correspond to a p value?
question 3: if no p value- how do i determine whether to accept or reject the null?

Thank you

hlsmith

Less is more. Stay pure. Stay poor.
You need to look up the value on a chi-square distribution table or you could use computer software. A general rule for getting an idea if the value may be significant is squaring 1.96 the cut-off value for the normal distribution. So if we say, hey our value is more extreme than 3.84, we know that it should be associated with a p-value < 0.05 (since 3.84 is associated with the 0.05 level of significance marker for the X**2 distribution). When looking at a table it appears the p-value should be < (1-0.995).

See if you can come up with those same results.