Confidence interval for proportion
In a recent survey of 205 never-married single women, 78% thought they would eventually find, and marry, their perfect mate. A 95% Confidence Interval for this proportion would be .78 plus or minus
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The meat department of a supermarket sells ground beef in approximate 1 lb packages, but there is some variability. A random sample of 65 packages yielded a mean of 1.05 lbs and a standard deviation of .23 lbs. What is the 90% Confidence Interval
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The meat department of a supermarket sells ground beef in approximate 1 lb packages, but there is some variability. A random sample of 65 packages yielded a mean of 1.05 lbs and a standard deviation of .23 lbs. What is the 95% Confidence Interval
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