Question

The table lists survey results obtained from a random sample of different crime victims. Use a 0.01 significance level to test the claim that the type of crime is independent of whether the criminal is a stranger.

	Homicide	Robbery	Assault
Criminal was a stranger	15	379	727
Criminal was an acquaintance or relative	36	103	642

State the null and the alternative hypotheses. Choose the correct answer below.

~The null hypothesis. The type of crime is independent of whether the criminal is a stranger. The        alternative hypothesis. The type of crime is a somehow related to whether the criminal is a stranger.

~The null hypothesis. The type of crime is somehow related to whether the criminal is a stranger. The alternative hypothesis. The type of crime is independent of whether the criminal is a stranger.

Assuming independence between the two variables, find the expected frequency to each cell or the table.

	Homicide	Robbery	Assault
Criminal was a stranger
Criminal was an acquaintance or relative

Find the value of x 2 test statistic.

            X 2= ____

Use the given significance level to find the x 2 critical value.

The critical value is ______(round to the nearest thousandth as needed)

E. Using the given significance level complete the test of the calm that the two variables are independent. State the conclusion that addresses the original claim. Choose the correct answer below.

~The type of crime appears to be somehow related to whether the criminal is a stranger.

Answer 1

Homicide Robbery Aasul niminal 下2千 (Ex-28f.eg Ex-L.8t 3 C1Ex=20.94 ulah're y. 82 a S We reject te null