- Describe the (Ho) null hypothesis for a test of independence.
- An investigator was interested in the relationship between color preference and number of siblings. A test of independence produced a 2 that allowed the null hypothesis to be rejected. Write a proper conclusion for this test result.
- Explain the short cut method of calculating 2 and give a numerical example
- Describe Phi and the odds ratio
- A social psychologist hypothesized that a factor in juvenile delinquency was the presence or absence of a strong father-figure in the home. He examined the folders of 100 inmates in the federal reformatory and found that only 50 of these young men grew up with a strong father-figure in the home. He also examined the records of 100 randomly selected male college students and found that 70 of them had strong father-figures in their boyhood homes.
Use the chi square method to test the psychologist’s hypothesis.
Chapter-14
- A labor official predicted that the following percentages of makes of cars would be seen passing a picket line at an automobile plant where a strike was in progress.
General Motors Ford Chrysler Foreign Brand
38% 28% 24% 10%
The following numbers of cars were counted. Analyze the data and write a conclusion about the official’s prediction.
General Motors Ford Chrysler Foreign Brand
114 72 75 41
- On a test of independence between alcoholism and early toilet training, a clinical researcher found a 2 = 6.48. With df = 1 and = .05, write a conclusion about the relationship between the two variables.
