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A machine produces parts with lengths that are normally distributed with σ = 0.69. A sample...

A machine produces parts with lengths that are normally distributed with σ = 0.69. A sample of 19 parts has a mean length of 76.89.

(a) Give a point estimate for μ. (Give your answer correct to two decimal places.)

(b) Find the 98% confidence maximum error of estimate for μ. (Give your answer correct to three decimal places.)

(c) Find the 98% confidence interval for μ. (Give your answer correct to three decimal places.)

Lower Limit ______

Upper Limit ______

You may need to use the appropriate table in Appendix B to answer this question.

math   Statistics-And-Probability   
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Solwion (A)S Sin populahon Sadadeviahon 2.33 /3D maxqin errov wll be o69 6 1) la 0 SG8

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