(Answered) A process is normally distributed with a mean of 104

Statistics

A process is normally distributed with a mean of 104 rotations per minute and a standard deviation of 8.2 rotations per minute. If a randomly selected minute has 128 rotations per minute, would the process be considered in control or out of control?

In control as this one data point is not more than three standard deviations from the mean

In control as only one data point would be outside the allowable range

Out of control as this one data point is more than three standard deviations from the mean

Out of control as this one data point is more than two standard deviations from the mean

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