A survey of 500 non-fatal accidents showed that 122 involved uninsured drivers. Construct a 96% confidence interval for the proportion of fatal accidents that involved uninsured drivers. (Show work)
1) A survey of 500 non-fatal accidents showed that 122 involved uninsured drivers. Construct a 96% confidence interval for the proportion of fatal accidents that involved uninsured drivers. (Show work)
2) Many people think that a national lobby's successful fight against gun control legislation is reflecting the will of a minority of Americans. A random sample of 4000 citizens yielded 2250 who are in favor of gun control legislation. Estimate the true proportion of all Americans who are in favor of gun control legislation using a 92% confidence interval. Express the answer in the form p^± E. (Show work)
3) A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in order to be 91% confident that the sample proportion will not differ from the true proportion by more than 4%? A previous study indicates that the proportion of left-handed scientists is 8%. (Show work)
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