Mean, Standard Deviation, and Margin of Error
View the Lesson | MATHguide homepage Updated June 22nd, 2023


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Given: Sentences were chosen at random from Ernest Hemingway's book The Old Man and the Sea. The number of words in the sentences were counted. This is the result.

201619102036721376
982391358323212216
Problem:Use the data above to: a) determine the mean and sample standard deviation, b) calculate a 95% margin of error, c) determine the respective confidence interval.

 
 Mean (x̄) =

Sample Standard Deviation (s) =

Margin of Error =

The confidence interval is [, ]