7. * The number of blocked intrusion attempts on each day during the first two w

Question

7. * The number of blocked intrusion attempts on each day during the first two weeks of the month were 56, 47, 49, 37, 38, 60, 50, 43, 43, 59, 50, 56, 54, 78. After the change of firewall settings, the number of blocked intrusions during the next 20 days were 43, 23, 32, 49, 45, 38, 44, 33, 32, 43, 51, 46, 36, 48, 39, 35, 37, 36, 39, 45. The histograms and the boxplots given below represent the number of blocked intrusions before and after the change. Comparing the number of blocked intrusions before and after the change, # of blocked intrusions before the change after the change 0 40 50 60 70 80 304050607080 before after no. of blocked intrusion attempts no. of blocked intrusion attempts (a) compute the sample means, the sample variances, and the sample standard deviations (before and after the change); (b) compute the five-point summaries and check for outliers (before and after the change); (c) comment on your findings.

Explanation / Answer

a)

b) Before:

Min - 37

Q1 - 44

Median - 50

Q3 - 56

Max - 78

After:

Min - 23

Q1 - 35.75

Median - 39

Q3 - 45

Max - 51

From the boxplot, we have an outlier in before the change and it is "78".

c) From the boxplot, we can see that the mean before was decreased after the change.

mean variance standard deviation before 51.42857 111.1868 10.54452 after 39.7 48.53684 6.966839

Related Questions

Navigate

• Browse (All)
• Browse 7
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.