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The 95% confidence interval for these parts is 56.98 to 57.05 under normal operations. A systematic...

The 95% confidence interval for these parts is 56.98 to 57.05 under normal operations. A systematic sample is taken from the manufacturing line to determine if the production process is still within acceptable levels. The mean of the sample is 56.99. What should be done about the production line?

Stop the line as it is outside the confidence interval
Keep the line operating as it is inside the confidence interval
Stop the line as it is inside the confidence interval
Keep the line operating as it is outside the confidence interval
Math   Statistics-And-Probability   
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