Question 30 (Textile Engineering & Fibre Science)
A yarn has mean strength of 10 N with a standard deviation of 1 N. The number of tests which must be conducted, so that at 95% confidence level, maximum error in the estimated mean strength is 1.96% is ____________________
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Given ,
Standard deviation()=1 N
Mean strength(x)=10 N
Maximum error in mean strength(S.E%)=1.96%
The number of tensts(N)=?
By formula-
N=100 (Ans)