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In: Statistics and Probability

A new process will be testing for electroplating nickel. The current process is tested on thirty...

  1. A new process will be testing for electroplating nickel. The current process is tested on thirty slugs, and the mean thickness of the nickel is 0.0020 m with a sample standard deviation of 0.0005 m. The new process is also tested on thirty slugs remaining a sample mean of 0.0022 m and a sample standard deviation of 0.0003 m. Assume equal variances.

    (a) Does the new process result in a greater thickness of nickel? Use α = 0.05. (b) Determine the 99% confidence interval for the difference in the means.

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orchestra answered 11 months ago
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