A random sample of n 9 structural elements is tested for compressive strength We know that the true mean compressive strength 5500 psi and the standard deviation is 100 psi Find the probability that the sample mean compressive strength exceeds 4985 psi ...

A random sample of n = 9 structural elements is tested for compressive strength. We know that

Question:

A random sample of n = 9 structural elements is tested for compressive strength. We know that the true mean compressive strength μ = 5500 psi and the standard deviation is σ = 100 psi. Find the probability that the sample mean compressive strength exceeds 4985 psi.