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The National Institute of Standards and Technology (NIST) offers Standard Reference Materials to aid in the calibration of mePlease help me solve

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Answer #1

Test statistic = z

= (\bar x - \mu ) / \sigma    / \sqrt n

= (20.17 - 20.15) / 0.02041

Test statistic = 0.98

P(z > 0.98) = 0.1635

P-value = 0.1635

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