# GATE (TF) Textile 2006 Question Paper Solution | GATE/2006/TF/58

One hundred 1.5 dtex polyester fibres with density of 1.35 g/cm3 are tested on a CRE tensile tester. 95% confidence range of main tensile properties are follows
Tenacity (gf/tex): 35 5.32
Elongation (%) : 30 7
Initial Modulus (gf/tex) : 35 9

###### Question 58 (Textile Engineering & Fibre Science)

If 38% confidence range elongation (%) with same error percentage is required to be 30 9, the number of samples required to be tested is

Given-
At 95% confidence range-
S.E._1=7

N1=100

By formula- CV=35.71

Again,

S.E_2=5

N_2=? (Ans)
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