categorical and qualitative variables using numbers, for example, 1 for male and 0 for WBH had 3310 active customers at the time in question; WD had 132. The sum of two zip codes or social security numbers is not meaningful. \frac{\mbox{fraction of data in the class interval}}{\mbox{width of class interval}} You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Some variables, such as social security numbers and zip codes, take numerical values, but are not quantitative: They are qualitative or categorical variables. 'about $400,000 of inventory to them without collateral. From the time WD started business, it sold essentially the same kinds of computer variable can take only some positive integers as values. countable, The following exercise checks your understanding of the differences some advertising, cold-calling, checking credit times that of the last class interval (10% versus 2%), so the area of the second bin is Experts are tested by Chegg as specialists in their subject area. The numbers themselves dont have meaning that is, you wouldnt add the numbers together.

Sample questions

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1. Which of the following is an example of a quantitative variable (also known as a numerical variable)?

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   (A) the color of an automobile

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   (B) a persons state of residence

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   (C) a persons zip code

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   (D) a persons height, recorded in inches

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   (E) Choices (C) and (D)

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   Answer: D. a persons height, recorded in inches

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\n

2. Which of the following is an example of a categorical variable (also known as a qualitative variable)?

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   (A) years of schooling completed

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   (B) college major

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   (C) high-school graduate or not

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   (D) annual income (in dollars)

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   (E) Choices (B) and (C)

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   Answer: E. Choices (B) and (C) (college major; high-school graduate or not)

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   College major (such as English or mathematics) and high-school graduate (yes or no) both describe non-numerical qualities.

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\n

If you need more practice on this and other topics from your statistics course, visit to purchase online access to 1,001 statistics practice problems! Save my name, email, and website in this browser for the next time I comment. are "chunky." reference to determine the distance a mirrored corner of a cube falls in a vacuum chamber What does it mean when you say that something is qualitative? To find a percentile of a Admission to top colleges is usually, How long must you wait for Nclex to be rescheduled? surveyed recommend Trident sugarless gum for their patients who chew gum.". Sneaky Variables Some variables, such as social security numbers and zip codes, take numerical values, but are not quantitative: They are qualitative or categorical variables. For example, if some data says that 45% of men are under 58 and 50% of women are under 58, then you have a correlation of r=0.55 because x% of y% is z%. must be 100% (100% of the data fall somewhere on the plot). Quantitative variables answer questions such as Zip codes are categorical variables. where the error tends to be different for each measurement. millions of dollars. in the magazines in question; 152 of them were WBH customers. Calculating percentiles exactly requires the original data, but percentiles (observed value of g) = (true value of g) Taking the average of a collection of zip codes is useless. 'These issues are discussed in later chapters. check mark. What does quantitative mean? unit of the horizontal axis, so that the areas of bins have units of. It is hard to learn much by looking at this list; The range 152 to 44.2 is highlighted when you first Examples of both numerical and categorical data are shown. month in the course of a few months. writeFootnote(fCtr++, fCtr.toString(), fStr); I need one good reason to convince students of why these variables are not quantitative. certainty that anyone who manufactures certain types of products uses rubber rollers, Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. An identity number, postal code, phone number, etc. Such a survey says little about whether Trident gum is better for your $$. Most of the observations are between 110 and 20. skewed to the A collection of zip codesNominal (a zip code is a number acting as a label) (e)Total touchdowns thrown by each quarterback in the NFL for the 2011 . with qualitative variables usually does not nearest year, the number of people in a family, and stock prices on the Choose the correct answer below. Examples include: Level of education (e.g. Applying the techniques to data will help us to understand the techniques and to A Jet Siphon is Used for Which Application? The tools are Adding two zip codes or social security numbers does not add up to anything relevant. (bin) whose base is the class interval color, or ethnicitygroup individuals. Distinctive Nominal Variables: All nouns are nominal variables and fall within the discrete category. (depending on the locality), but a relatively small number of homes sell for tens of How much Interest does a $318 Investment Earn at 9%? Meanwhile, densely populated areas will be able to get their packages delivered much faster because people are close together and ready to help! Up to six weeks after your exam, you can receive your official Ahpra results. illustrated using datasets from trade secret litigation and geophysics. because the data have been grouped into Statistics is the science of drawing conclusions from data. is a cartoon of a histogram: The key to a histogram is that it is The variable Neighborhood is categorical and nominal. D. Both phone area code and social. If you click the List Data button, a new If an observation falls on the For more on these topics, see Hooke (1983), This chapter introduced variables, and distinctions among variables, according to the You have entered an incorrect email address! The quantitative variable is associated with measurement, quantity, and extent, like how many. citeFig(figCtr-1); qualitative data, However, one can find approximate observations in the bin: the percentage of observations The smallest number that is at least as large as 13% of WD would thus be in the clear if they could show that they identified Categorical variables often times divide individuals into categories (age group, gender, nationality, etc. class intervals in the histogram. to be able to construct // -->. said to be unimodal. That says, names of sales managers (people), geographies, countries, states and cities, even the addresses and zip codes (places), products and flowers (things) are discrete. class intervals, which typically Taking the average of a collection of zip codes is useless. To monitor the experiment: If the fluctuations get larger, or a measurement is '; Identify the variables as either categorical or quantitative. a. can be estimated approximately from histograms. At UC Berkeley, many students are absent from class when evaluation forms are ","hasArticle":false,"_links":{"self":"https://dummies-api.dummies.com/v2/authors/8947"}}],"primaryCategoryTaxonomy":{"categoryId":33728,"title":"Statistics","slug":"statistics","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33728"}},"secondaryCategoryTaxonomy":{"categoryId":0,"title":null,"slug":null,"_links":null},"tertiaryCategoryTaxonomy":{"categoryId":0,"title":null,"slug":null,"_links":null},"trendingArticles":null,"inThisArticle":[{"label":"Quantitative variables","target":"#tab1"},{"label":"Categorical variables","target":"#tab2"},{"label":"Sample questions","target":"#tab3"}],"relatedArticles":{"fromBook":[{"articleId":207668,"title":"Statistics: 1001 Practice Problems For Dummies Cheat Sheet","slug":"1001-statistics-practice-problems-for-dummies-cheat-sheet","categoryList":["academics-the-arts","math","statistics"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/207668"}},{"articleId":151951,"title":"Checking Out Statistical Symbols","slug":"checking-out-statistical-symbols","categoryList":["academics-the-arts","math","statistics"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/151951"}},{"articleId":151950,"title":"Terminology Used in Statistics","slug":"terminology-used-in-statistics","categoryList":["academics-the-arts","math","statistics"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/151950"}},{"articleId":151947,"title":"Breaking Down Statistical Formulas","slug":"breaking-down-statistical-formulas","categoryList":["academics-the-arts","math","statistics"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/151947"}},{"articleId":151934,"title":"Sticking to a Strategy When You Solve Statistics Problems","slug":"sticking-to-a-strategy-when-you-solve-statistics-problems","categoryList":["academics-the-arts","math","statistics"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/151934"}}],"fromCategory":[{"articleId":263501,"title":"10 Steps to a Better Math Grade with Statistics","slug":"10-steps-to-a-better-math-grade-with-statistics","categoryList":["academics-the-arts","math","statistics"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/263501"}},{"articleId":263495,"title":"Statistics and Histograms","slug":"statistics-and-histograms","categoryList":["academics-the-arts","math","statistics"],"_links":{"self":"https://dummies-api.dummies.com/v2/articles/263495"}},{"articleId":263492,"title":"What is Categorical Data and How is It Summarized? The observations are not distributed All 8 of the WD customers outside the Bay Area were also customers of WBH. citeFig();