Determine the true proportion of home owners
A report states that 46% of home owners had a vegetable garden. How large a sample is required to determine the true proportion of home owners who have vegetable gardens to within 3% with 99% confidence?
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A radio manufacture claims that 65% of teenagers 13 to 16 years old have their own portable radios. A researcher wishes to test claim and chooses a random sample of 80 teenagers. She finds out that 57 have their own portable radios. At a=0.05, sho
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