STAT 301        Statistics I      Fall 2009

Day-by-day notes (middle third of course)

Mon Oct 12:

  1. Go over exam preparation advice
  2. Review selected HW problems
  3. Look through exam review problem
  4. Work through first two examples of handout titled “Inference for 2×2 Tables” (see handout here)

 

Studies: Dolphin therapy, Yawning study

 

Topics: Simulating randomization test for assessing statistical significance with 2×2 tables

 

Find dolphin applet here and yawning applet here

 

Wed Oct 14: Exam 1

 

Mon Oct 19

  1. Quick recap of simulating randomization test for 2×2 tables
  2. Work through last example of handout titled “Inference for 2×2 Tables” (see handout here)
  3. Work through Investigation 1.6.2 (page 58)
  4. Work through Investigations 1.7.1 (page 63) and 1.7.2 (page 72)

 

Studies: Kristin Gilbert murder trial, rat suture study, dolphin therapy (cont.), yawning study (cont.), friendly observers study, minority baseball coaches

 

Topics: Random assignment, observational study; cause-and-effect conclusions, combinations, hypergeometric probabilities, Fisher’s exact test, effect of sample size

 

Minitab: Graph> Probability distribution plot> Hypergeometric

 

Find 2×2 table simulation applet here

 

Wed Oct 21

  1. Quick recap of previous class
  2. Define explanatory and response variables (page 8)
  3. Work through Investigation 1.3.1 (page 25)
  4. Discuss Practice Problem 1.3.1 (page 27)
  5. Work through Investigation 1.4.1 (page 32)
  6. Work through Investigation 1.1.1 (page 2)
  7. Work through Investigations 1.2.1 (page 10) and 1.2.2 (page 15)

 

Studies: Night lights and near-sightedness, holiday heart attacks, foreign language study, popcorn and lung disease, smoking and lung disease

 

Topics: Explanatory vs. response variable, segmented bar graph, confounding, randomized comparative experiment, blindness, double-blindness, relative risk, odds ratio, case-control and cohort and cross-classified studies

 

Mon Oct 26

  1. Quick recap of previous class
  2. Work through handout titled “Comparing Two Proportions (Independent Samples)” (see handout here)
  3. Work through Investigation 5.1.2 (page 413), developing two-proportion z-test and z-interval, but with “native Californian” context
  4. Discuss Practice Problem 5.1.1

 

Studies: Native Californians study, “Governator” study

 

Topics: Independent random sampling, null model, simulation, approximate p-value, two-sample z-test for comparing proportions, standard error, technical conditions, two-sample z-interval for difference in proportions

 

Minitab: Stat> Basic Statistics> 2 Proportions…

 

Wed Oct 28

  1. Quick recap of previous class: two-proportion z-test, z-interval
  2. Work through “self-attractiveness” example with varying sample sizes
  3. Apply Wilson adjustment (page 417) to class-collected data on pet CPR
  4. Work through Investigation 5.1.3 (page 420), leading to CI for odds ratio
  5. Discuss Practice Problem 5.2.1 (page 431)

 

Studies: Self-attractiveness study, pet CPR study, New Zealand sleepless driver study, “violence begets violence?” study

 

Topics: Duality between tests and intervals, effect of sample size, practical vs. statistical significance, Wilson adjustment, sampling distribution of sample odds ratio, log transformation, confidence interval for population odds ratio

 

Mon Nov 2

  1. Go over exam preparation advice
  2. Review selected HW problems
  3. Work through handout titled “Comparing Two Groups with a Quantitative Response” (see handout here)

 

Studies: Sleep deprivation study, age discrimination study

 

Topics: Simulating randomization test for comparing two groups with quantitative response, approximate and exact randomization distribution, approximate and exact p-value

 

Wed Nov 4: Exam 2