October 17, 2007
Hello all, its been some time since I've posted a blog. Following is a list of topics we have covered since the last posting.
Cross sectional v. longitudinal (Trend, Cohort, and Panel) Surveys
Designing Questions for Surveys (Phrasing Questions)
Samples (Simple Random, Systematic, and Stratified)
Descriptive v. Inferential Statistics
Measures of Central Tendency (Mode, Median, Mean)
Range
Standard Deviation
Relationships between variables (Unrelated, Linear, Nonlinear)
Correlations (Strength, direction)
Spurious Relationships
Central Limits Theorem
Kurtosis and Skewness
Confidence Level
Confidence Interval
Question for thought: In class today we discussed spurious relationships. I'd like you to come up with one of your own. For example, There is a relationship between number of firefighters and property damage. The more firefighters, the more property they damage. The third intervening variable is size of the fire. A larger fire requires more firefighters and a larger fire causes more damage.
Cross sectional v. longitudinal (Trend, Cohort, and Panel) Surveys
Designing Questions for Surveys (Phrasing Questions)
Samples (Simple Random, Systematic, and Stratified)
Descriptive v. Inferential Statistics
Measures of Central Tendency (Mode, Median, Mean)
Range
Standard Deviation
Relationships between variables (Unrelated, Linear, Nonlinear)
Correlations (Strength, direction)
Spurious Relationships
Central Limits Theorem
Kurtosis and Skewness
Confidence Level
Confidence Interval
Question for thought: In class today we discussed spurious relationships. I'd like you to come up with one of your own. For example, There is a relationship between number of firefighters and property damage. The more firefighters, the more property they damage. The third intervening variable is size of the fire. A larger fire requires more firefighters and a larger fire causes more damage.
posted by Dr. Jeffrey Bolt at 9:29 PM
23 Comments:
There is a relationship between crime rate and the amount of police officers in various cities. The spurious variable is population. There are more police officers and crimes commited in larger population areas.
Ryan Tokarz
There is a relationship between basketball players and them being Millionaires. The 3rd variable or spurious variable is the NBA. If you are a baseketball player and play in the NBA you will be a millionaire.
Ryan Repka
There is a relationship between hair length and amount of sports watched. The spurious relationship would be gender. People with short hair, males, appear to watch more sports than females.
that was mine above..=)
Jessica Jerew
There is a relationship between candy sales and pumpkin sales. The spurious relationship is Halloween. During the Halloween season, people buy candy to pass out to the kids and also carve pumpkins.
Nicole Hanwell
Nicole Hanwell
--Halloween would be the 3rd variable... sorry!!
There is a relationship between mittens and snowmans. The spurious variable is winter season. People wear mittens and make snowmans during the winter season.
Michelle Watkins
There is a relationship between bathing suits and towels. The spurious variable is the pool. People wear bathing suits and use beach towels at the pool.
- Melissa Capo
There is a relationship between beers sales and amount of football people watch. If beer sales go up there must be a lot of football viewing. The third variable is that for the most part society doesn't work on weekends (so they drink).
Nathan LaRiccia
There is a relationship between the amount of fender benders and thermal clothing sales. The more fender benders there are the more thermal clothing is sold. The 3rd variable is the winter weather.
Nicole Liccardi
There is a relationship between flip flop sales and increase in price of water bills. The third intervening variable is summertime. There are more flip flop sales in the summer and the water bills increase in the summer because people are filling up their pools.
-Lauren Carll
There is a relationship between warm weather and melanoma. The 3rd variable is the sun. More people are outside and in the sun when the weather is warm, exposing them to skin cancer.
Kristy Lastoria
There is a relationship between the severity of the damage caused by natural disasters and the government deficiency to respond properly; the severe the aftermath, the less appropriate the response is. The third intervening variable in this spurious relationship is the tremendous expanses spent on the war on Iraq.
Mohamed Aboulhaya
There is a relationship between scotch tape and winter. The spurious relationship would be the holdiay season and gift giving. People have to buy more tape when they wrap presents.
Hannah Cermak
Theres a relationship between gifts and wrapping paper. The 3rd variable is Christmas. People buy gifts, wrap them in the wrapping paper as they celebrate Christmas.
--Shana DiTosto
The two variables are people who have shaved heads tend to carry automatic weapons. The spurious relationship is people in the military.
Tyler Reichenbach
There is a relationship b/w items returned at a store and incompetent cashiers. The more items returned the more incompetent cashiers there are. The 3rd variable is the store
Sean McCafferty
There is a relationship between number of marathons held in city (on the east coast) and the number of runners who particiapte. The more marathons the more runners. The third intervening variable is the time of year. More marathons are held in the warmer months on the east coast, May through September, than October through April.
S Rhea
There is a relationship between how many hours a person works and how well they do in school. The spurious relationship is time availability.
Nichole Justus
There is a relationship between warm winter coats and fire wood. the third variable would be an extremely cold winter approaching. The weather requires more fire wood to be purchased along with winter coats.
-Melody Allison
There is a relationship between men and the increased sale of flowers. The 3rd variable is Valentine's Day because that is when most men buy flowers for their girlfriends.
Ashley Cox
There is a relationship between cancer and Pennsylvania residents. The spurious variable is toxic dumping grounds in PA. Where there is toxic waste, there is cancer. The state itself, has no affect on cancer being so prominent.
Love,
Allison Cappel
There is a relationship between winter and depression. The spurious relationship would be the lack of sunlight.
-elisa vega
Post a Comment
<< Home