← All activities ↩ Source slide · Lesson 3, slide 20
Lesson 3 · Pop Quiz

Pop Quiz: Normal & Exponential Stalls

An in-class activity from the course slides — reproduced here so you can find it again after class.

📋 What to do

  1. A volunteer at the Ithaca Farmers Market tracked n = 500 customers and recorded how many stalls each one visited: a mean of 5.5 stalls, a median of 5 stalls, and a standard deviation of 2.5 stalls.
  2. Suppose we are not certain that the unobserved vector of visits is Poisson.
  3. Calculate the probability that a customer stops at more than 5 stalls under the Normal distribution.
  4. Calculate the same probability under the Exponential distribution.
  5. Report both probabilities. Be ready to say which assumption you would trust here and why.

📮 Submit

The quiz opens on Canvas during class (1 pt) — graded on accuracy. You will find it in this week’s module on Canvas once your instructor opens it.

Note: work from this page — it is where the activity and its links (slide decks, shared materials) are maintained, and details may still be refined before class. Submission happens on Canvas, and so do the due date and your grade.