State DMV records indicate that of all vehicles
Chapter 8, Problem 8.35(choose chapter or problem)
State DMV records indicate that of all vehicles undergoingemissions testing during the previous year, 70% passed onthe first try. A random sample of 200 cars tested in a particularcounty during the current year yields 124 that passedon the initial test. Does this suggest that the true proportionfor this county during the current year differs from the previousstatewide proportion? Test the relevant hypothesesusing a .05.
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