Best Answer

It is 0.2325

Q: If a light bulb has a mean of 1400 hours and a standard deviation of 100 hr what is the probability that the light bulb lasts between 1290 hours and 1530 hours?

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The Z Value, or Z Score, does not apply to the mean, it is a representation of a piece of data. z = (x-µ)/sigma

The z-score can't be calculated with the information given. A mean & standard deviation is required to put into the formula: Z = (x-mean)/sigma. Your x value is 10.

7/24

What is the probability of a type I error? What does this mean?How would you use this same information but set it up in a way that allows you to conduct a t-test? An ANOVA?

The common standard is 40 hours per week for 50 weeks = 2,000 hours.

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z score = (400-500)/80=-1.25 probability under curve to right of -1.25 = .8944

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2 hours

The Z Value, or Z Score, does not apply to the mean, it is a representation of a piece of data. z = (x-µ)/sigma

One hour.

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One hour.

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Uganda is seven hours behind Australian Eastern Standard Time and eight hours ahead of North American Eastern Standard Time.

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