3. Chi-square test of independence. A nefarious black hat hacker is trying to de

Question

3. Chi-square test of independence. A nefarious black hat hacker is trying to decide whether to employ humans to try and extract sensitive information from victims by phishing, or to use the SNAP_R software instead of humans. Obviously, the hacker will only consider using the software if it performs at least as well as the humans. Are phishing method and victimization independent? Explain how you know by specifying Ho and Ha and showing how you draw a conclusion from the output below. > ct human 49 80 SNAP R 275 544 >chisq.test (ct) Pearson's Chi-squared test with Yates' continuity correction data: ct X-squared = .7762, df = 1, p-value = ,3783

Explanation / Answer

Null Hypothesis: There is no association between Phishing method and victimization.

Vs

Alternative hypothesis: There is association between Phishing method and victimization.

Here the Pvalue for the chi-squared test 0.3783 indicates the acceptance of null hypothesis at 5% level of significance.

That is Phishing method and victimization are independent.

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