Edmunds.com would like to test the hypothesis that the standard deviation for the age of an imported car on the road is greater than the standard deviation for the age of a domestic car.The following data shows the ages of a random sample of import and domestic cars. 
Which of the following would be the correct hypothesis test?
Definitions:
Type Of Binding
Refers to the method or technique used to attach individual pages together into a book or document.
Observational Study
A research method in which the investigator passively observes and records phenomena without altering the environment or conditions.
Sample Survey
A method of collecting data by selecting a subset of individuals from a population to estimate characteristics of the whole population.
Double-Blind Experiment
An experimental method in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.
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