Calculation of Confidence Interval
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The breaking strengths of cables produced by a certain manufacturer have a standard deviation of pounds. A random sample of newly manufactured cables has a mean breaking strength of pounds. Based on this sample, find a confidence interval for the true mean breaking strength of all cables produced by this manufacturer. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.
What is the lower limit of the 90% confidence interval ? _________
What is the upper limit of the 90% confidence interval ? _________
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Solution Summary
This posting provides example of calculating confidence interval - lower confidence limit and upper confidence limit. The example includes breaking strength of cables.
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The breaking strengths of cables produced by a certain manufacturer have a standard deviation of pounds. A random sample of newly manufactured ...
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