Ch. 12 Experimental Design Basics
- 1. OBJECTIVES 1. 2. 3. HW REMINDERS Read 292 - 298 Ch. 13: # 2, 4, 6, 8 Quiz Tuesday Dec. 11 Ch. 12 & 13 HW Check Experimental Design Basics
- 2. (Question taken from Barron's AP Statistics Review Guide 2007 (3rd Edition)) Each of the 29 NBA teams has 12 players. A sample of 58 players is to be chosen as follows. Each team will be asked to place 12 cards with their players names into a hat and randomly draw out 2 names. The two names from each team will be combined to make up the sample. Will this method result in a simple random sample of the 348 basketball players? A. Yes, because each player has the same chance of being selected B. Yes because each team is equally represented C. Yes because this is an example of stratified sampling, which is a special case of SRS D. No, because the teams are not chosen randomly E. No, because not each group of 58 players has the same chance of being selected
- 3. (Question taken from Barron's AP Statistics Review Guide 2007 (3rd Edition)) Each of the 29 NBA teams has 12 players. A sample of 58 players is to be chosen as follows. Each team will be asked to place 12 cards with their players names into a hat and randomly draw out 2 names. The two names from each team will be combined to make up the sample. Will this method result in a simple random sample of the 348 basketball players? A. Yes, because each player has the same chance of being selected B. Yes because each team is equally represented C. Yes because this is an example of stratified sampling, which is a special case of SRS D. No, because the teams are not chosen randomly E. No, because not each group of 58 players has the same chance of being selected
- 4. (Question taken from Barron's AP Statistics Review Guide 2007 (3rd Edition)) To obtain a sample of 25 students from among the 500 students present in school one day, a surveyor decides to pick every twentieth student waiting on line to attend a required school assembly in the gym. (a) Explain why this procedure will not result in a simple random sample of the students present that day (b) Describe a procedure that will result in a simple random sample of the students present that day