HW #26 - Sampling

1. (IN CLASS) Get a SRS of size 5 of all NFL teams: Start with Row 4.

Buffalo Bills
Miami Dolphins
New England Patriots
New York Jets
Baltimore Ravens
Cincinnati Bengals
Cleveland Browns
Pittsburgh Steelers
Houston Texans
Indianapolis Colts
Jacksonville Jaguars
Tennessee Titans
Denver Broncos
Kansas City Chiefs
Oakland Raiders
San Diego Chargers
/ Dallas Cowboys
New York Giants
Philadelphia Eagles
Washington Redskins
Chicago Bears
Detroit Lions
Green Bay Packers
Minnesota Vikings
Atlanta Falcons
Carolina Panthers
New Orleans Saints
Tampa Bay Buccaneers
Arizona Cardinals
St. Louis Rams
San Francisco 49ers
Seattle Seahawks

2. (SOLUTION GIVEN) Get a SRS of size 5 of all MLB teams: Start with Row 3.

Baltimore Orioles
Boston Red Sox
New York Yankees
Tampa Bay Devil Rays
Toronto Blue Jays
Chicago White Sox
Cleveland Indians
Detroit Tigers
Kansas City Royals
Minnesota Twins
Los Angeles Angels
Oakland Athletics
Seattle Mariners
Texas Rangers
/ Atlanta Braves
Florida Marlins
New York Mets
Philadelphia Phillies
Washington Nationals
Chicago Cubs
Cincinnati Reds
Houston Astros
Milwaukee Brewers
Pittsburgh Pirates
St. Louis Cardinals
Arizona Diamondbacks
Colorado Rockies
Los Angeles Dodgers
San Diego Padres
San Francisco Giants

3. (HOMEWORK PROBLEM) Get a SRS of size 4 of all NBA teams: Start with Row 1.

Boston Celtics
New Jersey Nets
New York Knicks
Philadelphia 76ers
Toronto Raptors
Chicago Bulls
Cleveland Cavaliers
Detroit Pistons
Indiana Pacers
Milwaukee Bucks
Atlanta Hawks
Charlotte Bobcats
Miami Heat
Orlando Magic
Washington Wizards
/ Dallas Mavericks
Houston Rockets
Memphis Grizzlies
New Orleans Hornets
San Antonio Spurs
Denver Nuggets
Minnesota Timberwolves
Portland Trail Blazers
Seattle SuperSonics
Utah Jazz
Golden State Warriors
Los Angeles Clippers
Los Angeles Lakers
Phoenix Suns
Sacramento Kings

4. (ALTERNATE HW) Get a SRS of size 4 of all NHL teams: Start with Row 6.

New Jersey Devils
New York Islanders
New York Rangers
Philadelphia Flyers
Pittsburgh Penguins
Boston Bruins
Buffalo Sabres
Montreal Canadiens
Ottawa Senators
Toronto Maple Leafs
Atlanta Thrashers
Carolina Hurricanes
Florida Panthers
Tampa Bay Lightning
Washington Capitals
/ Chicago Blackhawks
Columbus Blue Jackets
Detroit Red Wings
Nashville Predators
St. Louis Blues
Calgary Flames
Colorado Avalanche
Edmonton Oilers
Minnesota Wild
Vancouver Canucks
Anaheim Ducks
Dallas Stars
Los Angeles Kings
Phoenix Coyotes
San Jose Sharks

5. (IN CLASS) There are signs on the canal banks in Grand Junction telling people to stay off. A questionnaire was sent to Grand Junction residents asking if people still used the canal banks for recreation. Of course, not all questionnaires were returned. Do you think the percentage of all Grand Junction residents that use the canal banks for recreation would be higher, lower or about the same as the percentage on the returned questionnaires?

6. (SOLUTION GIVEN) Have you ever used marijuana? This question is asked to a random sample of people. Do you think the percentage of all people that have used marijuana is higher, lower, or about the same as the results of the sample study?

7. (HOMEWORK) On October 2, 2007, on www.denverpost.com a poll question was asking if the Colorado Rockies Matt Holliday should be the MVP (Most Valuable Player). Do you think the percentage of all baseball fans that would choose Holliday would be higher, lower, or about the same as on www.denverpost.com ?

8. (ALTERNATE HW) A sample of 100 people are asked what their favorite fast-food restaurant is. The 100 people were all people having lunch at McDonalds. Do you think the percentage of all Americans that will choose McDonalds will be higher, lower, or about the same as compared to the sample results?

9. (IN CLASS) Suppose we wish to decrease the amount DUI accidents in the US. If you study US cities you will find a very strong relationship between the number of churches and the number of DUI arrests. That is, cities with a lot of churches tend to have a lot of DUI arrests. Do you think that we could cut down on the number of DUI accidents by simply getting rid of churches, explain.

10. (SOLUTION GIVEN) Does tutoring really help? In a study of college math students it was found that students who used tutors actually did worse on exams than students who had no tutoring at all. Do you think there is a simple solution for students to improve in college math, that is, simply get rid of all tutoring? Explain.

11. (HOMEWORK) A certain city has four hospitals. One hospital (A) is a large regional medical center with a great reputation. The other three hospitals (B, C, D) are small local hospitals. In a study in the percentage of patients dying in surgery is done. The percentage for hospital A is nearly three times as high as each of the other 3 hospitals. One possible reason is that hospital A does not deserve its reputation. Give another possible reason.

12. (ALTERNATE HW) In a study of professors at a prestigious university it was found that a much higher percentage of men were full professors as compared to woman. One possible is discrimination. Give another possible explanation.