Escàner_20170328.jpg - I 13 Quick Start makes 12 volt car...

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Unformatted text preview: I 13. Quick Start makes 12 - volt car batteries. After many years of product testing. the company knows the average life of a Quick Start battery is normally distributed, with a mean of 45 months and a standard deviation of 3 months. h a) If Quick Start fully refunds any batteries that fail within a 36 - month period of .L_ purchase, what percentage of batteries will the company expect to replace ? b) If QuickStart does not want to make refunds for more than 10% of its batteries under full - refund guarantee policy, for how long should the company guarantee the batteries ? ( round to nearest month ) £101; :3 256*! ' 50 # ”Di/z. -- M 2 3 Wk re ...
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Christopher Reinemann
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