Measurements of the weights of a random sample of 400 ball bearings made by a certain machine one week, whowed a mean of 0.87 kilogram and a standard deviation of 0.018. The 99% confidence interval for the mean weight of all the ball bearings (rounded off to three decimals) is: O A. [0.868; 0.872] O B. [0.867; 0.871] O C. [0.869; 0.871]

MATLAB: An Introduction with Applications
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Measurements of the weights of a random sample of 400 ball bearings made by a certain machine one week, whowed a
mean of 0.87 kilogram and a standard deviation of 0.018. The 99% confidence interval for the mean weight of all the ball
bearings (rounded off to three decimals) is:
O A. [0.868; 0.872]
O B. [0.867; 0.871]
O C. [0.869; 0.871]
O D. [0.869; 0.874]
Transcribed Image Text:Measurements of the weights of a random sample of 400 ball bearings made by a certain machine one week, whowed a mean of 0.87 kilogram and a standard deviation of 0.018. The 99% confidence interval for the mean weight of all the ball bearings (rounded off to three decimals) is: O A. [0.868; 0.872] O B. [0.867; 0.871] O C. [0.869; 0.871] O D. [0.869; 0.874]
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