Probability Question

roby

New Member
#1
can anyone help me with this question. a company manufactures computer chips. the machine that makes these disks produces 5% defective chips. the inspector selects a sample of random 100 disks each week and inspects them for defects. i have to describe the sampling distribution of the sample proportion of defective ships and standard deviation. then the next question says if more than 10% of the chips in the sample are defective the manufacturing process is stopped and the machine readjusted. what is the probability that the process will be stopped to readjust the machine?
thanks
Roby
 

JohnM

TS Contributor
#2
the mean percent defective in the samples will be the same as the percent defective in the population, so it's 5%

the standard deviation is the square root of (n*p*q) where q=1-p

use the normal approximation to the binomial to determine the probability of getting 10% defective or more in a sample