# Resource Library

#### Statistical Topic

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• ### Joke: The Vaccine and the experiment

A joke to help in a discussion of how a well designed experiment helps to reduce the variance of the response variable.  The Joke was written by Larry Lesser (The University of Texas at El Paso) and Dennis Pearl (Penn State University) in Februrary 2021.

Note - when the joke is spoken there is no need to say the parenthetical part - simply pronounce the word "variants" to sound like "variance".

• ### Poem: Matched Pairs

A poem to help in discussing matched-pair designs. UTEP Professor Larry Lesser wrote this poem on February 1, 2021, using end-rhyme couplets to convey (literally and figuratively) tradeoffs of a design with matched pairs.  Note that the rhymes are not always perfect, a reflection of how it can be impossible to match subjects perfectly. Also note how the would-be final couplet is ruined by losing its second line, just as you effectively lose two subjects when one subject in a pair chooses to drop out of your study.

• ### Poem: Permission to Add; Order to Subtract

A limerick to teach the inclusion-exclusion rule for finding the probability of the union of two events.  The poem was written by Marion D. Cohen from Drexel University and published in the January 2021 issue (vol 11 number 1) of the Journal of Humanistic Mathematics.

• ### Poem: Permission to Add

A limerick to teach the addition rule for finding the probability of the union of disjoint (mutually exclusive) events.  The limerick was written by Marion D. Cohen from Drexel University and published in the  January 2021 (vol. 11, issue 1) Journal of Humanistic Mathematics.

• ### Joke: Types of Data

A collection of jokes brainstormed by Larry Lesser (The University of Texas at El Paso) and Dennis Pearl (Penn State University) in January 2021, inspired by encountering the first item of unknown origin.  The collection is designed with a particular activity in mind to have students compose and think about the many ways data are viewed and handled by focusing on jokes of the form  "The data on _____A_________ are _____B_____,"

and then to explain what it means for data to be ___B____. 18 humorous examples are provided.

• ### Joke: Nonparametric Tests

A joke to be used in discussing the Sign test (based on whether an observation is above or below a specific value) and the Wilcoxon test (based on ordering the observations).  The joke was written by Larry Lesser from The University of Texas at El Paso in December 2020.

• ### Joke: In Denial

A pun to start a discussion of the use of a sign test.  The joke was written by Dennis Pearl from Penn State University in 2020.

• ### Cartoon: Non-Constant Variance

A 2020 cartoon illustrating the idea of heteroscedasticity (non-constant variance) that might be used to start a discussion on the important of the constant variance of errors in making inferences from regression models.  The cartoon was used in a 2021 Teaching Statistics paper "Statistical edutainment that lines up and fits," by Dennis Pearl from Penn State University and Larry Lesser from The University of Texas at El Paso.

• ### Poem: Regression to the Mean

Regression to the Mean is a 2009 poem by Andrew Porter of Wirral, England. The poem can be used in teaching about regression to the mean and the regression fallacy. Free for use in non-profit educational settings. A video featuring the poem being read aloud is at https://www.youtube.com/watch?v=D66I36fksZA

• ### Hand Squeeze Activity

A quick "hands on" activity for an in-class experience of data collection as a simple linear regression example where students  predict the time needed for a human chain of hand squeezes to make a full circuit as a function of number of people in the chain.  The lesson plan  secondary school lesson plan adapted from Cynthia Lanius’ hand squeeze activity by Bo Brawner at Tarleton State University.