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The lifetime of a 2 volt non- rechargeable battery has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours.What is the z- score for batteries with lifetimes of 600 hours

  • statistics -

    z-score = (X-μ)/σ
    μ=mean
    σ=standard deviation
    X=value of random variable (600)

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