Sampling and hypothesis testing

  • Very old man
    problem
    Favourite

    Very Old Man

    Age
    16 to 18
    Challenge level

    Is the age of this very old man statistically believable?

  • Reaction timer timer
    problem
    Favourite

    Reaction Timer Timer

    Age
    16 to 18
    Challenge level

    How can you time the reaction timer?

  • Chi-squared faker
    problem
    Favourite

    Chi-Squared Faker

    Age
    16 to 18
    Challenge level
    How would you massage the data in this Chi-squared test to both accept and reject the hypothesis?
  • Chance of that
    problem

    Chance of That

    Age
    16 to 18
    Challenge level
    What's the chance of a pair of lists of numbers having sample correlation exactly equal to zero?
  • Counting Fish
    problem

    Counting Fish

    Age
    14 to 16
    Challenge level

    I need a figure for the fish population in a lake. How does it help to catch and mark 40 fish?

  • Snow and Cholera
    problem

    Snow and Cholera

    Age
    14 to 16
    Challenge level

    What information helped medical pioneers decide on the cause of a disease? Especially in a time before microscopes were as powerful as they are today ?

  • Sleep: the silent killer
    problem

    Sleep: The Silent Killer

    Age
    16 to 18
    Challenge level
    "Too much sleep is deadly" proclaimed the newspaper headline. Is this true?
  • Robin's hypothesis testing
    problem

    Robin's Hypothesis Testing

    Age
    16 to 18
    Challenge level
    How many trials should we do in order to accept or reject our null hypothesis?
  • Hypothetical shorts
    problem

    Hypothetical Shorts

    Age
    16 to 18
    Challenge level
    Some short statements about hypothesis testing: are they true, false, or somewhere in between?
  • Powerful hypothesis testing
    problem

    Powerful Hypothesis Testing

    Age
    16 to 18
    Challenge level
    How effective are hypothesis tests at showing that our null hypothesis is wrong?
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