2b-Test your understanding of databases

2b-Test your understanding of databases - Test your...

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Unformatted text preview: Test your understanding of databases 1. Patients in a medical study are asked their age, their height, their weight, and the medicines they are taking. In the terminology of databases: a. What are the patients called? b. What is weight called? 2. A database on students contains grade point averages, ages, gender, and class rank (freshman, sophomore, junior, senior). a. Age is what kind of variable? b. Class rank is what kind of variable? 3. If a database is in spreadsheet format, the rows contain which one of the following, a. individuals b. variables. 4. Suppose a database has the cost per gallon that 20 gas stations in Manhattan, Kansas, charge for regular gas. What would be a common way to summarize this information? (answers on next page) Answers 1a. Patients are individuals. 1b. Weight is a variable. 2a. Age is a quantitative variable. 2b. Class rank is a categorical variable. 3. a. Rows contain individuals (the columns contain the variables). 4. Average price per gallon would be a common way to summarize the information. ...
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  • Fall '08
  • Boyer
  • Statistics, Manhattan, gas stations, Class Rank, grade point averages, common way

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