Review

1
Review

• 2-sample t, ANOVA, Chi-square

2
Working Problems

• From the story, what is the design
• From the design, what formula and computations?
• From the computations, what statistical
  conclusion?
• From the conclusion what is the interpretation in
  the original problem?

3
Political Ideology

• Angresti Finlay, Statisical methods for the
  social sciences, 4th ed., p 371. A (stratified)
  random sample of 15 democrats, 15 republicans,
  and 15 independent voters was interviewed to
  determine their political stance on a number of
  issues. Interviewers gave each voter a number
  indicating political ideology from 1 extremely
  liberal to 7 extremely conservative. We want to
  know whether there are differences among the
  groups. Data in politics.
• What design? What formula? What is alpha? What
  is the null? The alternative? What are the
  obtained and critical values? What is the result
  (is it sig)? Post hoc? What does it mean?

4
Blood Doping

• Witte Witte, Statistics, 8th ed, p. 282.
  Athletes have used EPO, a synthetic hormone to
  increase red blood cells. A physician wants to
  know whether it will increase the stamina of
  depressed patients. Participants (volunteers)
  are randomly assigned to an EOP group or a
  placebo group. After treatment, they are
  measured on total time in minutes that they can
  spend on a rapidly moving treadmill. Data in
  file BloodDope.
• What design? What formula? What is alpha? What
  is the null? The alternative? What are the
  obtained and critical values? What is the result
  (is it sig)? What does it mean?

5
Blood Bank

• Witte Witte, Statistics, 8th ed., p 418. A
  report from the surgeon general suggests that in
  the general population the proportion of various
  blood types is O.44, A.41, B.10, AB.5. A
  local bloodbank wants to know whether these
  proportions are accurate for the volunteers in
  the area. They dig up records for the last 100
  volunteers at the bloodmobile to test. Data in
  Blood Bank
• What design? What formula? What is alpha? What
  is the null? The alternative? What are the
  obtained and critical values? What is the result
  (is it sig)? What does it mean?

6
Diet, Exercise, Weight

• Female health club members interested in losing
  weight are randomly assigned to a high protein
  diet or instructed to maintain their ordinary
  diet. They are also assigned to one of three
  exercise groups aerobic, resistance training,
  or alternating (both aerobic and resistance on
  alternate days). At the end of 2 months, all are
  weighed. Data in DietExercise.
• What design? What formula? What is alpha? What
  is the null? The alternative? What are the
  obtained and critical values? What is the result
  (is it sig)? What does it mean?