Question

The life of a particular battery is known to follow a normal distribution , with a mean of 1264 hours and a standard deviation of 116 hours.

a. What percent of batteries last less than 1511 hours? 0.98341425

b. The 95 th percentile is represented by what number of hours of battery life?

c. What is the probability that a randomly selected battery will last more than 1154 hours? 0.17156471 Incorrect

Answer 1

Here, X: The life of a particular battery

X ~ N( 1264 , 116²)

a). percent of batteries last less than 1511 hours:-

  

  

  

b. The 95 th percentile is represented by the number of hours of battery life is:-

c). the probability that a randomly selected battery will last more than 1154 hours is:-

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