Confidence interval on a ballot issue
What size sample will be needed to construct a 95% confidence interval on a ballot issue if the estimate must be ± 2% of the actual percent. This issue looks very close in the election.
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Is there a statistically significant difference in ages of children assigned to the treatments? Apply the two sample z test at a 5% level of significance.
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Pat's twins, Sherry and Katie, finished their first year of school at an accredited university in 2013. She paid $9,000 in qualified educational expenses for Sherry and $3,000 of qualifying expenses for Katie.
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A sample of 800 voters revealed that 52% of them would vote for a specific issue. Create and interpret a 95% confidence interval for the support of the issue. In the interpretation indicate what type of statement you can make about the issue passi
He measures the temperature at 36 various random locations, puts the data into a calculator and determines a mean of 65.3 and a standard deviation of 2.4 degrees. Construct a 95% confidence interval for the lake temperature.
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