Normal Distribution Probability Calculation

Question

Which of the following is an example of applying the normal distribution calculation to determine the probability that a lightbulb will last less than $$1410$$ hours when lifetimes are normally distributed with $$\mu=1500$$ hours and $$\sigma=75$$ hours?

Accepted Answer

Using $$normalcdf(0, 1410, 1500, 75)$$ to obtain the desired probability.

Answer

Applying the central limit theorem directly without z-score conversion to obtain the probability.

Answer

Using $$invNorm(0.1410, 1500, 75)$$ to obtain the desired probability.

Answer

Using $$normalcdf(1410, 3000, 1500, 75)$$ to obtain the desired probability.

Normal Distribution Probability Calculation

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