Fisher's Exact Test in SPSS

This video demonstrates how to conduct a Fisher’s Exact Test in SPSS. The Fisher’s Exact Test is used as an alternative to the Chi-Square Test when working with small sample sizes.

[@yashikaneaves3818]

I appreciate you walking us through this process of clarity with Chi-Square and Fisher Exact Test.

[@bradleyfairchild1208]

At first, I was looking for the option to check for Fisher's Exact Test and then I watched this video and I see that it runs automatically. So anytime we have a smaller sample size and tables have cells with frequencies less than 5 then we interpret the Fisher's Exact Test. It is also interesting to me that this can change the interpretation drastically. Thank your Dr. Grande.

[@greggelliott4570]

Appreciated learning about the Chi-Square, the McNemar, and the Fisher's Exact all together. Helped to see how you would choose among them depending on what your data looks like.

[@vanessagraham6473]

This was helpful in understanding the difference between Fisher's Exact and Chi-Square as well as furthering my understanding of Chi-Square

[@corieschoeneberg9295]

Very helpful- thanks for distinguishing when this is applicable and when it's not

[@sannyuharris2827]

Thank you for distinguishing when to interpret the Pearson vs. the Fisher's Exact. It's good to know which one to reference especially if one value is greater than .05 and the other is not.

[@saadalhumaid3959]

thanks so much Dr Todd I learnt so much from you appreciate it

[@TRKovacs]

This is really helpful. How do you get effect size for the Fisher's Exact Test?

[@katibsareeh9056]

Thanks Dr. Todd. Please I would like to inquire more about Fisher's exact test in SPSS. I performed it on a sample of 141 patients with diabetic foot to see if there is an association between smoking and amputation. SPSS output table showed a value of 1.791 on the left side adjacent to "Fisher's exact test" sentence, and in the same row the P value was 0.454, and below the output table, the following sentence "The standardized statistic is -1.042.". what is the difference between the values 1.791 and -1.042 and how are they calculated?

[@alejandroanddrade]

So, what statistical test can I use if both variables are polytomous independent?

[@drlewisbutler6183]

Hi Dr. Todd. Thanks very much for the helpful video. My SPSS software doesnt seem to be automatically running a Fischer's exact test when there is an expected count of less than 5 with the Chi Square test. Please can you give me any advice? Cheers, Lewis Butler

[@el7543]

For Pearson Chi-Square, I was reporting the chi-squared value and the p-value. Why doesn't Fisher's exact test have anything under the 'Value' column? Which value would we report in a table if we use Fisher's exact test? Thank you

[@brianxu3681]

When do we look at the 2-sided vs 1-sided and which one do we apply it to?

[@ShaileshRegmirejin]

Informative I must say, thanks a lot

[@christinedurbin5628]

thank you, as always, for this helpful information!

[@panjapornchaichana6388]

Thank you very much. This video is so helpful and easy to follow.

[@MarkVanderley]

I am happy to know the options I have a researching when considering the Chi square test but my sample size is small

[@EinHarod9]

Thank you for the the excellent explanation! @ 7:50:" it's not statistically significant so we would reject null hypothesis..." seems like a slip of the tongue.

[@DrGrande]

Good catch, I should have said "fail to reject the null hypothesis."

[@zeussatrid7126]

@@DrGrande at 4:50 why is it statistically significant? p value less than 0.05 is significant, more than 0.05 its not significant?

[@drsophietan4284]

@@zeussatrid7126 Yes, because 0.22 is less than 0.05, thus it is statistically significant

[@farihah791]

Do we accept the null Hypothesis then

[@pr1257]

Can someone please help me/direct me on writing up the interpretation for the fishers exact test please?

[@yassercaghoreishi1178]

Thank you so much! very much informative!

[@kossonouprunelle7576]

Please can i interpret the result of the Fisher’s Exact Test as Fisher-Freeman-Halton Test, for a 3*5 contingency table in SPSS? I saw throught the internet that the result labeled as Fisher's Exact test in the output is in fact the Fisher-Freeman-Halton Test.

[@thusoetsilemodise4498]

great staff

[@donuts_are_good]

Lmaoooo what are the odds... Dr. Grande! Good to see you

[@israabaydoun192]

Thank you so much! you saved me!

[@coraliebedel1621]

Hello, thank you for your help. Is there a way to know the importance of a relation ? For example with Khi 2 there is the V of Cramer test. Is there an equivalent for the Fisher test ? Thank you !

[@patricepolmbayengoko7188]

Thanks

[@sereneSilvana]

Thank you! Very helpful! What test should I use if one of my variables is not dichotomous? I am trying to determine if two independent groups (one studying painting, one studying music) is significantly different in terms of temperament (4 types of temperament taken into consideration).

[@atvidigal83]

I've seen in another video that the likelihood ratio should be used in that case.

[@reecelal3633]

What happens if I don't get a figure for fisher's exact and just says 'b'?

[@helenapark7175]

I have 2*2 matrix with one cell that contains zero frequency. Can I still use the Fisher's exact test?

[@maxh.2209]

Can I still run the Chisquare if the variable is not dichotomous? Or does it lose its significance that way?

[@rpkaur12]

Sir, for my data I'm getting 14 cells which have an expected count less than 5. The minimum being .29. Does this mean I need to do the Fisher's Exact test, if so: in your video you've said the Fisher's exact test appears by it self when running the chi squared test however in my spss only -Pearson's chi sq -Likelihood ratio -linear-by-linear' -N of valid cases Comes up. The little red arrow is pointing at Likelihood ratio which is 0.062. Please advice on what to do. My sample size is between 30 to 37. So do I assume as the Fisher hasn't come up the chi sq is appropriate? If this is so, which value is used the pearson's chi sq or the likelihood ratio? Also how do you calculate/check the expected frequencies? Thank you.

[@derpfanatix3168]

My fisher exact does not appear in the output, anyone know how to fix this problem?

[@fatimatariq6672]

Is it necessary for the Pearson's chi square to be statistically significant if the fisher's exact is insignificant? What if both are greater than 0.05?

[@DrGrande]

+Fatima Tariq Only the appropriate test for the data should be interpreted. If the result is non-significant for that test then we would fail to reject the null hypothesis.

[@lll1722]

This is helpful. Just wonder if the Fisher's exact test is for counts less than 5 and must be dichotonmous, how about the situation when the count is less than 5 and it's not dichotonmous; but of ordinal scale(o to 4)? I tried this and SPSS doesn't give Fisher exact test value. Or what other test should be used if for this case? many thanks.

[@atvidigal83]

I've seen in another video that the likelihood ratio should be used in that case.

[@pedrovieirasarmetmoreira206]

@@atvidigal83 Can you supplie us the source (the video)?

[@AndyBritanny]

Pedro Vieira Sarmet Moreira sorry, I don’t remember where the video is anymore.

[@amnazia8583]

which test can be used if expected cell frequencies are less than 5 but variable is not dichotomous or having 3 or more categories ?

[@demeclocyclinesiadh1872]

am having the same question

[@atvidigal83]

I've seen in another video that the likelihood ratio should be used in that case.

[@saraspong6698]

Thank you

[@alexma4684]

Thx!!!

[@chikarism1st672]

my fisher Exact test is not showing any value

[@pingzhu606]

What kind of method should I use if the date have 2 columns（categorical variable） and 3 rows(continuous variable)?Thank you very much.

[@demeclocyclinesiadh1872]

I have the same question. Please let me know if you get the answer

[@fayezald]

Monte Carlo

[@fayezald]

You still gonna use chi-square however if the number of cells exceeds 20% you use monte Carlo exact test as alternative in more than 2x2 tables

[@Namiiii1004]

Why there's no value for fisher exact test

[@izzatulnadiahsuhaimi3546]

can i have the full question?

[@binudorjee5388]

very helpful

[@DrGrande]

Thank you.

[@nezhaelmansouri1033]

Thank youuuuuu

[@kuromyou7969]

Hmmm why do you sound familiar???