Publications by R/exams
Using LaTeX in R/exams: What, Why, How?
LaTeX is a document prepration system that is very powerful but can sometimes also be a bit confusing. Hence, some useful details are provided that should help R/exams users getting LaTeX installed and used effectively for preparing exams. What? LaTeX is a software system for document preparation, see the corresponding Wikipedia page for an over...
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scatterplot: Interpretation of a Scatterplot
Name: scatterplot Type: mchoice Description: Scatterplot in an (x, y) regression setup needs to be interpreted regarding location/spread of the marginal distributions, the correlation in the joint distribution, and the corresponding regression slope. Data are drawn randomly from a suitable data-generating process so that each multiple-choice it...
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ttest: Interpretation of 2-Sample t Test
Name: ttest Type: mchoice Description: Results of a 2-sample t.test() in R need to be interpreted regarding significance, type of alternative, and comparison of the underlying empirical means. Solution feedback: Yes Randomization: Random numbers, text blocks, and R output Mathematical notation: Yes Verbatim R input/output: Yes Images: No ...
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switzerland: Knowledge Quiz Question about Switzerland
Name: switzerland Type: mchoice Related: swisscapital Description: Knowledge quiz question (about Switzerland) with 2 correct and 3 false alternatives which are shuffled randomly in each version of the exercise. Solution feedback: Yes Randomization: Shuffling Mathematical notation: No Verbatim R input/output: No Images: No Other supple...
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tstat2: 1-Sample t-Test Statistic (Single-Choice)
Name: tstat2 Type: schoice Related: tstat Description: Computing the 1-sample t-test statistic from randomly-drawn hypothesized mean, sample size, and empirical mean and variance. The correct answer has to be selected from five choice items which have been added to the numeric version of the exercise linked above. Solution feedback: Yes Ra...
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swisscapital: Knowledge Quiz Question about the Swiss Capital
Name: swisscapital Type: schoice Related: switzerland Description: Knowledge quiz question (about the Swiss capital) with 1 correct and 6 false alternative. 4 out of the 6 false alternatives are sampled randomly and shuffled. Solution feedback: Yes Randomization: Shuffling (4 out of 6 false alternatives) Mathematical notation: No Verbati...
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tstat: 1-Sample t-Test Statistic
Name: tstat Type: num Related: tstat2 Description: Computing the 1-sample t-test statistic from randomly-drawn hypothesized mean, sample size, and empirical mean and variance. Solution feedback: Yes Randomization: Random numbers Mathematical notation: Yes Verbatim R input/output: No Images: No Other supplements: No Template: tstat.Rnw...
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Installing R/exams
1. R The R/exams system is an extension for the R system for statistical computing and hence the first installation step is the base R system. Windows and (Mac) OS X: Go to https://CRAN.R-project.org/, the Comprehensive R Archive Network (CRAN). Simply click on the link for your operating system and at least install the “base” system. It...
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First Steps
Overview The basic idea of R/exams is to have a one-for-all exams generator where each exercise is a standalone file, so that the same exercise can be rendered easily into a variety output formats such as e-learning systems or written exams. To reduce the risk of cheating, R/exams offers different mechanisms for drawing random variations of exer...
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Written Multiple-Choice Exams with R/exams
Create exam The first step in conducting a written exam with multiple-choice (and/or single-choice) exercises in R/exams’ NOPS format is to create the exam in PDF format. First, we load the R exams package and then simply create a list of exercise file names. library("exams") myexam <- list( "tstat2.Rnw", "ttest.Rnw", "relfreq.Rnw", "...
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