Pass or fail? Binomialrelated hypothesis testing and confidence intervals using independent samples - Improving the User Experience through Practical Data Analytics - page 107

Table 4.5 Completion Rates and Binomial Conidence Intervals for Tasks Comparing Novix and Behemoth Search Engines

Conidence
Intervals for
Successful
Completion on
Novix Search
Engine (out of 10)

Conidence
Intervals for
Successful
Completion on
Behemoth Search
Engine (out of 10)

Successful
Completion
on Behemoth
Search Engine
(out of 10)

Successful
Completion on
Novix Search
Engine (out of 10) Task # Verbatim Task

1 Find a Java developer with at least

5 years' experience within 50 miles
of Tucson, Arizona.

3 0.1033-0.6077 9 0.5740-0.9999

2 Find a Web designer with skills using

Photoshop, Illustrator, and Flash within
25 miles of San Diego, California.

2 0.0459-0.5206 7 0.3923-0.8967

3 Find an electrical engineer with a

minimum of a Bachelor's degree
within 25 miles of Boston,
Massachusetts.

1 0.0001-0.4260 8 0.4794-0.9541

4 Find a business analyst with an MBA.

There is no location requirement.

5 0.2366-0.7634 6 0.3116-0.8329

5 Find a technical writer within 50 miles

of Chicago. The maximum your client
is willing to spend on the position is
$50,000 per year.

7 0.3923-0.8967 8 0.4794-0.9541

6 Find an intern for a marketing

department within 25 miles of New
York City. The minimum education
level is a Bachelor's degree.

7 0.3923-0.8967 9 0.5740-0.9999

7 Find a vice president of development

who is willing to travel over 50%
percent of the time.

1 0.0001-0.4260 9 0.5740-0.9999