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Suppose the length of time an iPad battery lasts can be modeled by a normal distribu-tion...

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Question

Basic Math

Suppose the length of time an iPad battery lasts can be modeledby a normal distribu-tion with meanμ= 8.2 hours and standarddeviationσ= 1.2 hours.

a. What is the probability that randomly selected iPad lastslonger than 10 hours?

b. What is the probability that a randomly selected iPad lastsbetween 7 and 10hours?

c. What is the 3rd percentile of the battery times?

d. Suppose 16 iPads are randomly selected. What is theprobability that the meanlongevity Ì„Xis less than 7.9 hours?

Answer & Explanation Solved by verified expert
4.1 Ratings (684 Votes)
Mean 82Standard deviation 12a We have to find PX 10For finding this probability we have to find z scoreThat is we have to find PZ 15PZ 15 1 PZ 15 1 09332 00668 Usingz tableSo the probability that randomly selected iPad    See Answer
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