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Past experience has indicated that the breaking strength of yarn used in manufa...

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Past experience has indicated that the breaking

strength of yarn used in manufacturing drapery material is normally distributed and that

σ = 2 psi. A random sample of nine
specimens
is tested, and the average breaking strength is found
to be 98 psi
.

Find a 95% two-sided confidence interval

on the

true mean breaking strength.

(96.9, 99.1)

(96.7, 99.3)

100%

None of the other choices is correct

(96.3, 99.7)

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