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

Twelve different video games showing substance use were observed and the duration 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 data to construct a 90% confidence interval estimate of u, the mean duration of game play.

4042 3880 3850 4022 4322 4814 4660 4037 5003 4823 4332 4323

What is the confidence interval estimate of the population mean?

? < u < ?

Solutions

Expert Solution

First we need to find the mean and SD of data. Following table shows the calculations:

	X	(X-mean)^2
	4042	90198.1089
	3880	213749.0289
	3850	242388.8289
	4022	102611.3089
	4322	413.3089
	4814	222472.5889
	4660	100914.2289
	4037	93226.4089
	5003	436484.8489
	4823	231043.6489
	4332	106.7089
	4323	373.6489
Total	52108	1733982.667

Sample size: n=12

And

Mean:

Standard deviation:

The confidence interval estimate of the population mean is

orchestra answered 1 year ago

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