Prob with verification - equiv_test function

Hi all, I am trying to verify my excel calculations with matlab calculations, and I am getting a small difference which is affecting my verification function. I have to use "equiv_test" function. I have included the m file for this function. and the code I am writing is:

here is the code:

Sigma_Phi9_10_hand = 9.1564 

sigma_Phi9_10 = 9.6517

if equiv_test(sigma_Phi9_10,Phi9_mu_10_hand);
    disp('Q4 Req3 Part1-b'),
    disp('Verfification: Manual vector creation and calculation was done correctly');
else
    error('Verification : Manual vector creation and calculation was NOT done correctly');
end

Any suggestions on how to tell matlab to ignore the small difference? Many thanks in advance !