A company manufectures components with mean lifetime 190 hours and standard deviation of 15 hours What is the probabililty that a random sample of 20 resistors wil have an average ifetime of less than 105 hours? On.0.126 Ob. We do not have enough information to solve this problem. Oc0.2345 O d. 0.3451

Q: one standart?

A: here use Empirical rule

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