PLEASE PICK FROM OPTIONS BELOW DONT GIVE OTHER ANSWERS The association between cellular telephone use and the risk of brain cancer was investigated in a case-control study. The study included 100 cases with brain cancer and 100 controls. High cell phone use exposure was reported by 30% of cases. Normal cell phone use was reported by 160 of the 200 study participants. What is the odds ratio describing the relationship between high cell phone use exposure and brain cancer?   2.33   0.05   5.00   3.85     What is the interpretation of this odds ratio?   The risk of brain cancer is x times higher in the exposed group than the unexposed group.   Odds of high cell phone use among cases with brain cancer is x times higher than controls.   Odds of brain cancer is exactly the same in cases and controls.   None of the above.

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Data Dictionary

A database management system has an entity-relationship diagram, data dictionary, and data model as some of its key components, which are tools for the users who are managing the database. One of them is the data dictionary. The data dictionary can also be called metadata. By definition, metadata is a generic concept in the world of information and technology. An example of metadata could be meta-information about a media file or an image file, like author, location, last updated, size, etc. The contents of a data dictionary are names, attributes, and properties of main data elements which are captured during an experiment or stored in an information system, for example, databases. We can also call it a central repository of information about the main data.