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# Identifying individuals, variables and categorical variables in a data set

AP.STATS:
VAR‑1 (EU)
,
VAR‑1.B (LO)
,
VAR‑1.B.1 (EK)
,
VAR‑1.C (LO)
,
VAR‑1.C.1 (EK)
,
VAR‑1.C.2 (EK)
Identifying individuals, variables and categorical variables in a data set.

## Want to join the conversation?

• what does categorical mean
• It means the data in the set can be sorted into categories, in this case hot drinks and cold drinks. The sugar content, on the other hand, is not categorical, because a drink could have infinite different amounts of sugar.
Hope this helps!
• Why isn't the type of drink classified as a variable?
• It's not a variable because it's not describing anything or numbering anything. For example, "Type" is a categorial variable because it describes the heat of the drinks. "Sugars" is a quantitative variable because it numbers the amount of sugar in the drinks.
• What are the prerequisites for the Statistics and Probability course?
• Algebra is a must for any Statistics and Probability course.

Whether or not calculus is also required depends on how deeply the course goes into probability theory. If the course covers topics such as probability density functions of continuous random variables, cumulative distribution functions of continuous random variables, moment generating functions, and/or maximum likelihood estimators, then calculus would be required.
• what is standard deviation?
• Standard deviation is a measurement of the spread of the data. If you have a high standard deviation, that means your data are far away from the mean, while if it is low it means they are closer.
Hope this helps!
• where can you find the "individuals" of set of data in a given table?
• An individual is what the data is describing. In a table like this, each individual is represented by one row. So in this case, the individuals would be the drinks. An example individual is cappuccino, which is a hot coffee that has 60 calories, 8 grams of sugar, and 75 milligrams of caffeine.
• Why are there no missions for statistics and probability? If there is, can you tell where?
• Khan Academy is getting rid of Missions in June 2020, so they have not been adding them to existing courses. If you are wondering about mastery challenges or practice problems, you should be able to access problems and quizzes either by assigning AP Statistics as one of your courses or by looking at the course overview here: https://www.khanacademy.org/math/ap-statistics/analyzing-categorical-ap
Hope this helps!
• How i can get this lesson as a PDF or other Formats.
• While some KA courses also have documentation, i don't see any documentation for the statistics course.
In this case, you can either download the video for offline use (if thats what you're looking for), or you can look for another textbook.

The introductory statistics book of OpenStax (https://openstax.org/details/books/introductory-statistics) is written by professors and experts and is free to use. It contains the same info discussed here and can be downloaded as a PDF.

• What does quantitative mean in the Practice lesson after this video?
• I have just figured this out after not realising some of the questions asked for number of categorical variables and others asked for number of quantitative variables.

*Categorical refers to non numerical variables
*Quantitative refers to numeric variables

So if the variables are numbers they are quantitative, if they are words they are categorical.