Stat 202: Lecture 6 (covers pp. 84-99)

Nathan VanHoudnos
10/6/2014

Agenda

  1. Prior checkpoints
  2. Homework comments
  3. Checkpoints #5 & #6 results
  4. Lecture 6 (covers pp. 84-99)

Passing scores on checkpoints

Passing is somewhere around 60% depending on

  • the number of questions and
  • the performance of the class.

Specifically:

  • Checkpoint 1: 67% and above
  • Checkpoint 2: 57% and above
  • Checkpoint 3: 60% and above
  • Checkpoint 4: 57% and above

Crosstabs of passing / failing

TRUE is a pass, FALSE is a fail.
X1 is Checkpoint 1, X2 Checkpoint 2, etc.

                  X4 FALSE TRUE
X1    X2    X3                 
FALSE FALSE FALSE        2    0
            TRUE         0    2
      TRUE  FALSE        2    1
            TRUE         2    5
TRUE  FALSE FALSE        1    0
            TRUE         0    4
      TRUE  FALSE        1    1
            TRUE         2   53

Agenda

  1. Prior checkpoints
  2. Homework comments
  3. Checkpoints #5 & #6 results
  4. Lecture 6 (covers pp. 84-99)

Homework comments

  • R Lesson Demo
  • Questions?

Agenda

  1. Prior checkpoints
  2. Homework comments
  3. Checkpoints #5 & #6 results
  4. Lecture 6 (covers pp. 84-99)

Checkpoints #5 & #6

Checkpoint #5

  • average score: 92% correct
  • sampling frame: all individuals with a non-zero chance of being included, NOT the sample.
    • e.g. all students in statistics classes,
    • NOT the 500 students in the sample

Checkpoint #6

  • average score: 94%
  • every question answered correctly by least 85% of students

Agenda

  1. Prior checkpoints
  2. Homework comments
  3. Checkpoints #5 & #6 results
  4. Lecture 6 (covers pp. 84-99)

Big Picture