Probability-sample of tubes taken from group have mean life

Reference no: EM13141957

Certain tubes manufactured by a company have a mean life of 800 hours and standard deviation of 60 hours. Find the probability that a random sample of 16 tubes taken from the group will have a mean life of:

a)Between 790 and 810 hours
b)Less than 785 hours

Reference no: EM13141957

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