How can you rewrite P(z £ –1.75) in order to find the answer? P(z £ 1.75) P(z ³ -1.75) 1 - P(z £ -1.75) 1 - P(z £ 1.75)
2 answers:
Answer:
Option d is the right answer.
Step-by-step explanation:
Given that X, the life of a certain brand of battery is normally distributed, with mean 128 hours and standard deviation 16 hours.
Required probability = Prob that a battery you buy lasts at most 100 hours
=P(X<100)
Convert x into z
as
Z =
Required proba
=
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