When comparing two vendors' machines it is found that a sample of 1000 parts from machine A has 23 defectives and a sample of 1300 parts from machine B has 36 defectives. Do the data indicate that machine B has a higher rate of defectives?
If the value of the test statistic had been 7.03, what action should have been taken regarding the null hypothesis?
At a particular time, three components are in parallel and each has a reliability of 0.98. What is the reliability of the system?
The formula for reliability during constant failure rate conditions is:
Use this formula to find the reliability of a product at 800 hours if MTBF = 600 hours.
SCENARIO
A Six Sigma team is measuring the moisture content of corn starch as it leaves the conveyer belt of a dryer. They collect one sample four cups of starch at times indicated in the chart at fixed locations labeled A, B, C, and D across the end of the belt. See the diagram below.
After some work on the dryer, additional data are collected which when plotted looks like this:
Which type of variation dominates?
