Administracion De Empresas

1. A researcher working with elderly people is interested in whether memory decreases with age. He would also like to know if multiple choice memory tests are easier than essay type memory tests andif preference for multiple choice or essay may differ depending on age. Three age groups are tested (30-39, 40-49 and 50-59). Two memory tasks are given, a multiple choice task and an essay test.24 subjects are randomly assigned to six cells.
Factorial ANOVA – Two categorical variables and one continuous variable (performance on the task). Independent samples, Three or more samples (sixcells or groups), and Two factors (type of test and age group).
2. A political candidate wishes to determine if endorsing increased social spending is likely to affect her standing in the polls. She hasaccess to data on the popularity of 10 other candidates who have endorsed increased spending. The polling data was collected both before and after these candidates announced their support forincreased social spending.
Two sample t test for correlated samples – Pre and Post categorical variable and popularity continuous variable. Correlated Samples (pre and post), two samples.
3. A highwayengineer predicted what percentage of vehicles in a number of weight categories would use a new bridge if it was built. He based these predictions on guesses about increased manufacturing in the areaserved by the highway. The bridge was built and, during a test period, the number of vehicles in each weight class using the bridge was observed. The engineer would like to know if his predictionswere accurate.
Chi square test of goodness of fit – One categorical variable
4. A dentist wants to know if the flavor of toothpaste affects how often children brush their teeth (which should producedifferences in the number of cavities at the next checkup.) Children are randomly assigned to receive toothpaste in one of three flavors: cherry, bubblegum and spinach. The number of cavities is...