The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 195 and a variance of 25. The material is considered defective if the breaking strength is less than 182.5 pounds. What is the probability that a single, randomly selected piece of material will be defective? (You may need to use the standard normal distribution table. Round your answer to four decimal places.)

Question

anonymous · Answer

https://www.webassign.net/smithnm12/14-table-10.gif

anonymous · Answer

Do you know how to find z-scores?

anonymous · Answer

i believe they are listed on the chart.

anonymous · Answer

wait z=(x-mean)/standard deviation?

anonymous · Answer

Ok yes good, and herre I'll draw the nornal distribution for you:|dw:1379290193281:dw|