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Surveys

  • Lyrics © 2018 Lawrence M. Lesser
    may sing to the tune of "Annie's Song" by John Denver

    Don’t try for a census 
    when the best thing’s a sample.
    But now how could a sample 
    surpass trying for all?
    Well, samples are faster 
    (so less outdated data)
    and samples are cheaper 
    (less workers to hire)!

    Sometimes a census 
    simply can’t even be done:
    If you needed a blood test, 
    should they take some or all?
    If they crash-tested all cars, 
    they’d have no cars to sell you!
    Just take a sample 
    from what is mixed well.

    If the sample’s much smaller 
    than the whole population,
    Then precision goals lean on 
    the sample size n,
    Not the sampling fraction: 
    that is really amazing!
    Don’t try for a census, 
    come sample instead!

  • Q: What do you call noting prices of the candy by the front door at your neighborhood 7-Eleven?

    A: Convenience sampling.

    Larry Lesser

  • What explains why some Senators ignore testimony when they vote on Federal Court nominations?

    Answer: Confirmation bias.

    Larry Lesser and Dennis Pearl

  • lyric © 2017 Lawrence M. Lesser
    sing to the tune of the KC & the Sunshine Band hit “(Shake, Shake, Shake) Shake Your Booty”

    Two…. million readers
    picked Landon to
    advance;
    Gallup
    disagreed
    from thousands picked by chance.

    CHORUS:
    (Shake, shake, shake,
    shake, shake, shake:
    random sample,
    random sample)2x

    Ahhh, you think
    you can pick them
    very well,
    But drafting
    for Vietnam
    wasn’t swell.

    (Repeat Chorus)

    Shake, shake, shake
    shake, shake, shake:
    iPod Shuffle,
    quick pick lotto.
    Shake, shake, shake,
    take, take, take:
    random sample!

  • Lyrics © 2016 Amy Adler
    May be sung to the tune of "Miss Susie Had a Steamboat"

    Oh, once there was a teacher who wondered 'bout his class.
    (Do they) smile at him to please him? Or like to learn 'bout stats?

    So he set out to determine but didn't want to ask
    Every single student -- that was too much of a task.

    Instead he aimed to sample and interview some instead.
    But how to do that properly? He thought out in his head.

    He had to choose some students to represent the whole:
    What things should he consider? What does he need to know?

    How should he word the questions? And are there other facts,
    That might affect the outcome? He needs to know all that.

    Once he knows the questions and other relevant facts,
    He can take a sample that represents the class.

    But picking only certain ones, the result may go astray
    Picking those who get straight A's may be a biased way.

    Those who get straight A's might be more
    Prone to answer in the same way and skew the results for sure.

    To truly have the answer with high confidence,
    A random sample when you can is generally the best.

    So once he picked the sample -- he'd ask them one by one,
    And then he'd calculate how many said "It's fun!"

    He didn't want to call them or ask them face to face,
    So he emailed and repeated 'till every poll took place.

    He looked at the percentage who said that stats are great,
    And felt the un-polled students should agree at that same rate.

    So if he took a sample that represents the whole:
    He can estimate how many are stats fans on his roll.

  • Lyrics © Mary McLellan
    may sing to the tune of Meghan Trainor's "All About That Bass"

    You know you randomly select, select, no effect
    You know you randomly select, select, no effect
    You know you randomly select, select, no effect
    When your sample’s like the population you can generalize

    You know you randomly select, select, no effect
    You know you randomly select, select, no effect
    You know you randomly select, select, no effect
    When your sample’s like the population you can generalize

    When you make an experiment you must randomly assign
    To make the groups the same so your treatment is the why
    When you make an experiment you must randomly assign
    To make the groups the same so your treatment is the why

  • Lyrics © Mary McLellan
    may sing to the tune of Toni Basil's "Mickey" 

    Hey cluster- you’re a group. I will sample all of you
    HEY CLUSTER
    HEY CLUSTER
    Hey cluster- you’re a group. I will sample all of you
    HEY CLUSTER
    HEY CLUSTER
    Hey cluster- you’re a group. I’ll take all from some of you
    HEY CLUSTER
    HEY CLUSTER
    Hey cluster- you’re a group. I’ll take all from some of you
    HEY CLUSTER
    STRATIFY
    STRATIFY
    Homogeneous, every single group is homogenous.
    STRATIFY
    STRATIFY
    Homogeneous
    I get all kinds cuz- I get you and you and some of all of you

     

     

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