The line width of for semiconductor manufacturing is assumed to be normally distributed with a mean of 0.5 micrometer and a standard deviation of 0.05 micrometer.
a) What is the probability that a line width is greater than 0.62 micrometer?
b) What is the probability that a line width is between 0.47 and 0.63 micrometer?
c) The line width of 90% of samples is below what value?