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A car manufacturer tests the first 1,000 cars coming off the assembly line to see if their new anti-lock braking system works correctly. Use the typical values for control limits.

What percentage would be an expected outcome in a sample mean that is within ±3 standard deviations of the distribution mean?

A. 99.7%
B. 93.0%
C. 97.0%
D. 97.7%

Please explain answer

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