Part 2 Review

[jsaddlemyer]

Hi Justin,

First off, great work. I really wish I had something similar when I first learned stats. Structurally I think it has a nice flow, a good overview of the previous section, and the concepts are well explained. Below are my only comments.

Edits/suggestions (suggested adaptation in bold):

• The Dataset section:
  • [x] In this study, subjects also took surveys to determine properties about their sleep. The surveys provide three different metrics of sleep quality and wakefulness.
• Loading in the data set section:
  • [x] confidence when incorrect: Average confidence when the subject gave an incorrect response for all trials
• Effect of sleep quality on performance section:
  • [x] We have just investigated how the different sleep metrics are correlated. Now, let's turn our attention…
  • [x] Is the equation for the Pearson correlation correct? I could be mistaken, but shouldn’t the variances of x and y be represented as the variance of x is represented in the equation for the slope of the linear regression?
• Performing a linear regression section:
  • [x] The intercept is given by the mean of the y-values minus the slope times the mean of the x-values.
  • [x] I pause to note here that the slope (which is of primary interest) and the intercept are numbers
• A NHST for a linear regression section:
  • [x] If I re-run the notebook, I get a different p-value than what is currently remaining as output in the notebook.

[justinbois]

Thanks for the kind work, @jsaddlemyer . A few points:

1. The Pearson correlation formula is correct as written.
2. Great catch on the NHST. Fixed.
3. @adelnehme suggested not defining classes, as not all learners will be familiar with it. I wasn't sure how to do it, so I left the classes in there. I ended up coming up with a clean way to do it without classes using dictionaries and a function, so I updated the notebook to that effect.

I'll generate the student notebook soon.

[jsaddlemyer]

Hi @justinbois,

1) My apologies, I think I misread the description below regarding the equation. 3) I think the way you had introduced and described classes in the notebook was already clear, even to students not totally familiar with them. But indeed, the dictionary/function approach is a great alternative and should make it more accessible to students.

Thanks again!

Justin