necolewiggins3083
19.05.2020 •
Mathematics
Defective electronics: A team of designers was given the task of reducing the defect rate in the manufacture of a certain printed circuit board. The team decided to reconfigure the cooling system. A total of 973 boards were produced the week before the reconfiguration was implemented, and 254 of these were defective. A total of 874 boards were produced the week after reconfiguration, and 95 of these were defective. Construct a 90% confidence interval for the decrease in the defective rate after the reconfiguration.
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