SOLUTION: The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 110 pounds. A random sample of 150 newly manufactured cables has a mean breaking st
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Question 137663: The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 110 pounds. A random sample of 150 newly manufactured cables has a mean breaking strength of1750 pounds. Based on this sample, find a 90%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 confidence level
What is the higher limit of the confidence level
You can put this solution on YOUR website! The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 110 pounds. A random sample of 150 newly manufactured cables has a mean breaking strength of1750 pounds. Based on this sample,
find a 90% confidence interval for the true mean breaking strength of all cables produced by this manufacturer.
x-bar: 1750 lbs
E: 1.645 = 14.7745...
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90% CI: 1750-E < u < 1750+E
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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 confidence level:1735.225
What is the higher limit of the confidence level: 1764.775
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Cheers,
Stan H.
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