A certain type of storage battery lasts on the average 3 years, with a standard deviation of 0.5 years. Assumming that the battery lives are normally distributed, find the probability that a given battery last less than 2.3 years?
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A certain type of storage battery lasts on the average 3.0 years; with a standard deviation of 0.5 year. Assuming that the battery lives are normally distributed, find the probability that a given battery will last less than 2.3 years. Z = 3 − 2.3 0.5 = −1.4; P(X < 2.3) = P(Z < −1.4) = 0.808.
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0.0808
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