1.) Twelve different video games showing violence were observed. The duration times of violence were recorded, with the times (seconds) listed below. Assume that these sample data are used with a 0.01 significance level in a test of the claim that the population mean is greater than 75 seconds.

801556151056190421700254

a) Identify the null hypothesis and alternative hypothesis.

Ho:

Ha:

b) If we want to construct a confidence interval to be used for testing that claim, what confidence level should be used for a confidence interval?

The confidence level should be( )

c) If the confidence interval is found to be39.4sec<<242.9sec, what should we conclude about the claim?

The given confidence interval (contains/does not contain) the value of ( ) so there(is/is not) sufficient evidence to support the claim that the mean is greater than ( ) seconds.

2.) Determine whether the outcome is a Type I error, a Type II error, or a correct decision.

a) A test made ofHo:=15

Ha:>15

The true value of is 17, andHois not rejected.

The outcome of the test is a ( )

b) A test made ofHo:=41

Ha:<41

The true value ofis41, andHois not rejected.

The outcome of the test is a ( )

c) A test made ofHo:p=0.81

Ha:p0.81

The true value ofpis0.81, andHo isrejected.

The outcome of the test is a( )