GATE (TF) Textile 1992 Question Paper Solution | GATE/1992/TF/09 | Section A

Question 9 (Textile Engineering & Fibre Science)

The standard error of estimate of difference of two means having sample size of n_1 abd n_2 and pooled estimate of standard deviation s, is

(A)\sqrt{\frac{1}{n_1}+\frac{1}{n_2}}
(B)\sqrt{\frac{1}{2n_1}+\frac{1}{2n_2}}
(C)\sqrt{\frac{1}{n_1}-\frac{1}{n_2}}
(D)none of the above
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