Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Internet speeds are a heavily advertised selling point of Internet Service Providers. You notice that although you are paying for a certain speed, the true speed seems to vary depending on where you are in your house. In order to estimate the true average speed you are getting in your house, you go to 12 random spots around your house and record the speed (in MBs per second) shown from a test at www.speedtest.net'. You see that the average is 5.43 MB/s with a standard deviation of 1.574 MB/s. You decide to create a 90% confidence interval for the average internet speed in your house. What is the margin of error for this estimate?
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Transcribed Image Text:Internet speeds are a heavily advertised selling point of Internet Service Providers. You notice that although you are paying for a certain speed, the true speed seems to vary depending on where you are in your house. In order to estimate the true average speed you are getting in your house, you go to 12 random spots around your house and record the speed (in MBs per second) shown from a test at www.speedtest.net'. You see that the average is 5.43 MB/s with a standard deviation of 1.574 MB/s. You decide to create a 90% confidence interval for the average internet speed in your house. What is the margin of error for this estimate?
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