Question

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

an 80​%

confidence interval estimate of

sigmaσ​,

the standard deviation of the duration times of game play. Assume that this sample was obtained from a population with a normal distribution.

4536	4790	4619	4956	4001	3930
4415	4806	4665	3892	3985	4570

The confidence interval estimate is

secless than<sigmaσless than<nothing

sec.

Answer 1

The statistical software output for this problem is :

The 95% confidence interval for is,

  92108.025 < < 285268.61

303.493 sec < < 534.105 sec

answered by: anonymous