Purchase Solution

Attack ratio and Positive predictive value

Not what you're looking for?

Ask Custom Question

I am having diffiuculty with 2 questions.

1. Does specificity, or prevalence have a greater effect on positive predicitve values (PPV)?

2. 200 people at a dinner. 122 people get sick. 150 (of the 200) had ice cream- 118 got sick,

while- 50 (of the 200) had pie- 4 got sick.

Which desert was responsible for the illness, and why?

I used the ATTACK RATIO, to determine that the ice cream casued people to get sick

AR(ice cream)= 79%, AR (pie)= 8%. Am I correct and how do I wrtie why?

Purchase this Solution

Solution Summary

The attack ratio and positive predicted values are examined.

Solution Preview

(1). Prevalence will have a greater effect on positive predictive values. The prevalence of a test is much lower so the predictive value of a positive test will also be lower. As ...

Purchase this Solution

Free BrainMass Quizzes
Academic Reading and Writing: Critical Thinking

Importance of Critical Thinking

Situational Leadership

This quiz will help you better understand Situational Leadership and its theories.

Operations Management

This quiz tests a student's knowledge about Operations Management

Business Processes

This quiz is intended to help business students better understand business processes, including those related to manufacturing and marketing. The questions focus on terms used to describe business processes and marketing activities.

Cost Concepts: Analyzing Costs in Managerial Accounting

This quiz gives students the opportunity to assess their knowledge of cost concepts used in managerial accounting such as opportunity costs, marginal costs, relevant costs and the benefits and relationships that derive from them.