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Twelve different video games showing substance use were observed and the duration of times of game...

Twelve different video games showing substance use were observed and the duration of times of game play​ (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the sample data to construct a 90​% confidence interval estimate of sigma​, the standard deviation of the duration times of game play. Assume that this sample was obtained from a population with a normal distribution.

4296
4054
4381
3935
4332
4693
4710
4902
4570
4990
4082
4081


Math   Statistics-And-Probability   
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