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A test of 60 youths and 140 adults showed that 22 of the youths and 10 of the adults were careless drivers. Use a 1% level of significance to test the claim that the youth percentage of careless drivers is higher than the adult percentage. Next find the 99% confidence interval for this problem.

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    what the expected impact on the total revenue of a firm - price ekasticity of demand is known to be -0.5, and the firm raises price by 10 percent

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