Question

Vulnerability of relying party Web sites. Refer to the Proceedings of the 5th AMC Workshop on Computers & Communication Security (October 2012) study of the vulnerability of relying party (RP) Web sites, Exercise 8.59 (p. 489). Recall that the Web sites were categorized as server-flow or client-flow Web sites. The researchers want to estimate the true difference between the proportion of server-flow Web sites vulnerable to attack and the corresponding proportion of client-flow Web sites with a 95% confidence interval. They want to know how many Web sites of each type they need to sample to obtain an estimate that is no more than .15 from the true difference.

a. Identify the parameter of interest for this study.

Short answer

1. \({p_1} - {p_2}\)is the parameter of interest.

Step-by-step solution

Given Information

With a 95% confidence interval, the researchers intend to calculate the actual difference between the proportion of server flow web-sites and client flow websites.

An estimate is no more than.15 off from the actual difference.

Parameter

A parameter is a value. It is used to represent a certain characteristics of the population. A parameter is a fixed value. Population characteristic is called parameter.

Step 3:

Let\({p_1}\)be the proportion of server flow web-sites

\({p_2}\)be the proportion of server flow web-sites

So, the difference between them is\({p_1} - {p_2}\).

Therefore, \({p_1} - {p_2}\)is the parameter of interest.