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MODELING REAL LIFE In a survey of 920 U S teenagers 81 said that helping...

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MODELING REAL LIFE In a survey of 920 U S teenagers 81 said that helping others who are in need will be very important to them as adults The margin of error is 3 3 a Give an interval that is likely to contain the exact percentage of all U S teenagers who think that helping others who are in need will be very important to them as adults Between and b The population of teenagers in the U S is about 21 05 million Estimate the number of teenagers in the U S who think helping others will be very important to them as adults Between about million and million

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