(Solved): The lifespan of an X-ray tube used as part of an X-ray imaging machine follows a normal distributio ...
The lifespan of an X-ray tube used as part of an X-ray imaging machine follows a normal distribution with a mean of \( 6.75 \) years and a standard deviation of \( 1.7 \) years. a. Calculate the probability that a randomly-selected \( X \)-ray tube will have a lifespan of:
a. Calculate the probability that a randomly-selected X-ray tube will have a lifespan of: (i) Less than 3 years \[ P(X<3)= \] (ii) Greater than 9 years \[ P(X>9)= \]
(iii) Between 5 and 7 years \[ P(5