chubby347765

04-28-2008, 09:04 PM

I need help getting started. I figured out the mean and the SD. I am just not sure how to start the formula for figuring out part a, b and c.

The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa.

Mean=579

Sd=14

Find the z-score for each question as z=(x-mean)/sd

Z=(x-579)/14

(a) What is the probability that a randomly chosen sample of glass will break at less than 579 MPa?

(b) More than 590 MPa?

(c) Less than 600 MPa?

The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa.

Mean=579

Sd=14

Find the z-score for each question as z=(x-mean)/sd

Z=(x-579)/14

(a) What is the probability that a randomly chosen sample of glass will break at less than 579 MPa?

(b) More than 590 MPa?

(c) Less than 600 MPa?