Chi Square Expected Count less than 5!

#1
Hi there, any help needed with my problem would be MUCH appreciated.

I have a 2x7 design. Gender VS different treatment options. I did a Pearson's Chi Square and my expected cell count was less than 5 in more than 20% of cases and some expected counts were also less than 1. SPSS does not allows for Fisher's Exact Test to be conducted on contingency tables larger than 2x2. Any ideas how i can get round this?

Thank you in advance!
 
#4
I have seen bootstrapping on some SPSS tutorials, but i can't seem to find the option in my dialogue box. Not sure if it's an add on, will do some more research! Thanks!
 
#6
Yes, as suggested by Trinker, I recall that there should be an option in the SPSS menu to tell SPSS to also perform bootstrapped chi-square.

Gm
Not sure if i'm doing it wrong, but no bootstrapping option? However, if i go on the exact tab I can select Monte Carlo, Exact or Asymptotic only. If i select exact, it specifies a time limit of 5 minutes per test and the output gives me a fisher's exact reading. Is this a solution?
 

gianmarco

TS Contributor
#7
Hi,
unfortunately, I cannot see the details of the pict. Besides, I have not my Mac at hand so I cannot check by myself. In any instance, I think that that solution could work for you.

Some info on Monte Carlo in chi-square context at this link

Regards
Gm