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The life of a gas grill is 3.5 years with a standard deviation 0.35 years. What is the probability that the grill will last less than 3 years? 

 May 9, 2021
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3 years is  how many standard deviations away from 3.5 ??    .5 / .35 = 1.43 standard deviations below the mean====> z-score table = - 1.43

   from the negative  z-score table this represents .0764    or   7.64 %

 May 9, 2021

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