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🎓 Lecture 7 - Comparing two groupsSource
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⚖️Lecture 7 - Comparing two groups

🚦 Status🟣 Formatted
🧠 Mastery🐥 Apprentice
📅 Last Review25 May 2025

🎯KEY TAKEAWAYS

  1. To compare two groups, look at the difference and put an interval around that.
  2. The uncertainty of a difference is bigger than either group's own. Two wobbles, added.
  3. An interval that includes zero does not say no effect. It says cannot tell from this.
  4. I had a question and kept it. It is in the inbox now, which is not the same as asking.

⚡QUICK JOTS

  • mock midterm first, 45 minutes. 61. the sampling question again
  • then: two groups. is the difference real or is it two trays disagreeing
  • difference has its own standard error. you ADD the variances, even though you subtract the means
  • interval for the difference. if zero is inside, you have not shown much
  • pooled variance for means. he said when the groups are similar enough and moved on. similar enough to what
  • did not put my hand up
  • it is Greta's birthday. there was cake at four and I am still slightly sick

☑️HOMEWORK

  • Go through 📌 Statistics I - Mock midterm question by question
  • Ask Hale about pooled variance: ✏️ Jot - ask Hale about pooled variance
  • Write the exam-week routine
  • Revise lectures 3 to 7 for 📌 Statistics I - Midterm

📝LECTURE NOTES