a) Write down a Four-Field-Tableau. b) Which fault happens more often? c) Are the two type of faults independent of each other?

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The company ABCD produces simple calculators. 10% of the produced
items are defective. The reason for a defective calculator may be an
electronic fault or a mechanical fault or both. The probability for an
electronic fault is 4%. In 0.25% of all products the mechanic as well as
the electronic part is defective.
a) Write down a Four-Field-Tableau.
b) Which fault happens more often?
c) Are the two type of faults independent of each other?
d) Quality control makes an analysis of an item which shows both faults.
How many calculators have to be chosen randomly from the overall
production in order to find such an item with a probability of 95%?
Transcribed Image Text:The company ABCD produces simple calculators. 10% of the produced items are defective. The reason for a defective calculator may be an electronic fault or a mechanical fault or both. The probability for an electronic fault is 4%. In 0.25% of all products the mechanic as well as the electronic part is defective. a) Write down a Four-Field-Tableau. b) Which fault happens more often? c) Are the two type of faults independent of each other? d) Quality control makes an analysis of an item which shows both faults. How many calculators have to be chosen randomly from the overall production in order to find such an item with a probability of 95%?
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