Question

The comprehensive strength of concrete is normally distributed with mu = 2500 psi and sigma = 50

Answer 1

Answer:

Step-by-step explanation:

We have the following information given of  

μ

= 2500 psi,  

σ

= 50 psi, n = 5, and we are trying to find in the interval between 2499 psi to 2510 psi.

To represent what we are trying to find, the picture helps us determine what our value should be which looks to be only in the middle of the parabola drawn.

The equation to find the probability of one side is

x

−

μ

σ

√

(

n

)

Once we find that we get the z-score value to find the probability. Use a z-score table to solve for the probability

Once we do this for each side, we add the two sides up to find the total probability in between the intervals from 2499 psi to 2510 psi.