The tread life (x)of tires follownormaldistribution with 60,000 and ...

The tread life (x)Â Â of tires followÂ Â normal distribution with Âµ =Â Â 60,000 and Ïƒ= 6000 miles.Â Â The manufacturer guarantees the...

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The tread life (x)Â Â of tires followÂ Â normaldistribution with Âµ =Â Â 60,000 and Ïƒ= 6000miles.Â Â The manufacturer guarantees the tread life forthe first 52,000 miles. (i) What proportion of tireslastÂ Â at least 55,000 miles? (ii)Â Â Whatproportion of the tires will need to be replaced under warranty?(iii)Â Â If you buy 36 tires,Â Â what is theprobability that theÂ Â average life of your 36 tires willexceedÂ Â 61,000?Â Â (iv) The manufacturer iswilling to replace only 3% of its tires under a warranty programinvolving tread life.Â Â Find the tread life covered underthe warranty.

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3.8 Ratings (390 Votes)

Part aP X 55000 1 P X 55000 Standardizing the valueZ 55000 60000 6000Z 083P Z 083 P X 55000 1 P Z 083 P X 55000 1 02033P X 55000 07967Part vWhat See Answer

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