Standard Error

(8 minutes)

Introductions

• Icebreaker: What is a good non-computer game to play over Zoom?

Groupwork

For each question:

1. Explore the answer yourself
2. Discuss your answer with your partner(s)
3. Write down your joint answer(s)

You will provide your answers in the survey link below.

Probability Distributions

Consider the below pictures. On the x-axis is the experiment number and the y-axis is the value. The blue lines depict the population mean. Each x is a sample value.

The first graph shows 10 experiments each N=3 (i.e., sample size is 3), with the experimental mean shown with a red dot.

The second graph shows 100 experiments each N=3 with the bars depicting the standard error for that experiment.

1. How many of the standard error bars should intersect the blue line in the right graph?

2. If N=20, what would the left and right graphs look like?

3. If N=20, now how many of the standard error bars should intersect the blue line?

Hand-in

Have ONE person from each group submit the group's answers:

https://wpi.qualtrics.com/jfe/form/SV_895cSt4X7lnFchM

Make sure to include the names of all group members.

Happy standard error-ing!

-- Mark