Question: p Chart for Defective Car Batteries Defective car batteries are a nuisance because they can strand and inconvenience drivers. A car battery is considered to
p Chart for Defective Car Batteries Defective car batteries are a nuisance because they can strand and inconvenience drivers. A car battery is considered to be defective if it fails before its warranty expires. Defects are identified when the batteries are returned under the warranty program. The Powerco Battery corporation manufactures car batteries in batches of 1000 and the numbers of defects are listed below for each of 12 consecutive batches. Does the manufacturing process require correction?
Defects: 8 6 5 9 10 7 7 4 6 11 5 8
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