Question

In: Statistics and Probability

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

9595 %

confidence interval estimate of

muμ ,

the mean duration of game play.

40444044

38743874

38673867

40324032

43174317

48104810

46604660

40274027

50075007

48184818

43444344

43164316

Click

Solutions

Expert Solution

Formula for Confidence Interval for Population mean when population Standard deviation is not known

Sample size : n = 12

Sample mean:

Sample standard deviation :

	x:Duration time
	4044	-299	89401
	3874	-469	219961
	3867	-476	226576
	4032	-311	96721
	4317	-26	676
	4810	467	218089
	4660	317	100489
	4027	-316	99856
	5007	664	440896
	4818	475	225625
	4344	1	1
	4316	-27	729
Total	52116		= 1719020
Mean	= 52116/12 =4343

Sample Size : n	12
Degrees of freedom : n-1	11
Confidence Level :	95
= (100-95)/100	0.05
/2 = 0.05/2	0.025
	2.201

95 % Confidence interval estimate of , the mean duration of game play:

95 % Confidence interval estimate of , the mean duration of game play = (4091.8267,4594.1733)

orchestra answered 1 year ago

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