1. Describe the purpose of a data dictionary. What are some of the key components of a data dictionary? (Approximate length: 150-200 words)
2. What is a dataset? Name five different datasets used in the context of EHRs, and describe how they are used. (Approximate length: 250-300 words)
3. Describe three different security methods based on technology that can be used to comply with HIPAA security rule standards. (Approximate length: 250-300 words)
4. Consider the following scenario: Patients are seen by physicians either in hospitals or clinics. Each patient visit to a clinic or hospital generates a physician encounter. Each patient visit may generate a referral to a laboratory for further testing.

   To keep track of this information, you are required to design and create a data model in the form of an entity-relationship diagram. You may include the following entities in your solution: Patient, PatientVisit, LabOrder. You are required to construct the entity-relationship diagram using Visio. Drawing it on paper or using other tools such as Word is not acceptable. With some practice, you will find Visio is much easier to use to construct these diagrams.

   Explain the entity-relationship diagram in your own words in a Word document. Describe the entities, their purpose and the reason for each attribute.