The numbers of blocked intrusion attempts on each day during the first two weeks of the month were-
53, 47, 49, 37, 38, 60, 50, 43, 43, 59, 50, 56, 54, 59

Construct a stem-and-leaf plot and find the quartiles number of blocked intrusion.

(a) Construct a 95% confidence interval for the difference between the average number of intrusion attempts per day before and after the change of firewall setting (assume equal variance)

To Find :

The area of green shaded region in given image.

Solution :

The area of green shaded region is given by :

Area = Area of outer square - Area of inner rectangle

Area = x² - ( x - 20)×( x - 25 )

Area = x² - ( x² - 25x - 20x + 500 )

Area = 45x - 500

Hence, this is the required solution.