a) A report says that the average amount of time a 10-year-old American child spends playing...

a) A report says that the average amount of time a 10-year-old American child spends playing outdoors per day is between 19.96 and 26 minutes. What is the margin of error in this report?

b) What is the margin of error for a poll with a sample size of 550 people? Round your answer to the nearest hundredth of a percent.

c) If you want a poll to have a margin of error of 3.26%, how large will your sample have to be? Round your answer to the nearest whole number.

d) An informal report says that the average amount of time a students works on math for Math 120 at CCCOnline is between 2.4 and 5.48 hours. What is the margin of error in this report?

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orchestra answered 1 year ago

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