2/16/2009

Chapter 7

Case Study 7-1 Ability and Performance

• Ability - a characteristic
• Performance - statistics measure performance

Case Study 7-2 Simulating a batter's performance if his ability is known

• Spinner
• Simulation with Minitab
  • 150 simulations of 10 at bats for Roberto Alomar (p = 0.4 of getting on base)
  • Calc > Random Data > Binomial
  • Stat > Tables > Tally individual variables
  • Compare with Table 7.1 on p. 184

Case Study 7-3 Learning about a batter's ability

• Simulations with different values of p
• Identify the most likely value of p, conditional on the observed value of x.

Case Study 7-4 Interval estimates for ability

• General form of confidence intervals for p
  • p-hat +/- z*SE
• Confidence intervals with Minitab
  • Stat > Basic Statistics > 1 Proportion

Case Study 7-5 Comparing Wade Boggs and Tony Gwynn

• Two separate confidence intervals
• Confidence intervals for the difference in two proportions
  • Stat > Basic Statistics > 2 Proportions

Class Exercises

Leadoff Exercise, 7.1, 7.3, 7.5

Please complete your reading of Chapter 7 for class on Wednesday.