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Is the first step to find the critical value

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In a factory the time it takes to assemble given equipment varies from worker to worker, but it is known that the distribution of assembly time is normal with the mean of 100 minutes and with the standard deviation of 10 minutes.

The new management gives the bonus to 10% of workers with the shortest assembly time. What is the largest assembly time that qualifies a worker for a bonus?

Is the first step to find the critical value? If so, how do I go about doing that. After I find the critical value, don't I multiply it times 10 and then add it to 100?

Reference no: EM132845604

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