Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that σ = 3 psi. A random sample of 10 specimens is tested, and the average breaking strength is found to be 94 psi. Find a 95% two-sided confidence interval on the true mean breaking strength. Round the answers to 1 decimal place

95% Confidence interval:  (92.1,95.9)

Step-by-step explanation:

We are given the following in the question:

Sample mean, = 94 psi

Sample size, n = 10

Alpha, α = 0.05

Population standard deviation, σ = 3 psi

95% Confidence interval:

Putting the values, we get,

(92.1,95.9) is the required 95% confidence interval on the true mean breaking strength.

what are ur choices?