If a sample of 600 people is selected and the researcher decides to have a margin of error of 4% on the specific proportion who favor gun control, find the degree of confidence. A recent study showed that 50% were in favor of some form of gun control.
Answer to relevant QuestionsIn a study, 68% of 1015 adults said that they believe the Republicans favor the rich. If the margin of error was 3 percentage points, what was the confidence interval used for the proportion? A survey found that out of 200 workers, 168 said they were interrupted three or more times an hour by phone messages, faxes, etc. Find the 90% confidence interval of the population proportion of workers who are interrupted ...The national average for the number of students per teacher for all U.S. public schools is 15.9.Arandom sample of 12 school districts from a moderately populated area showed that the mean number of students per teacher was ...Find the values for each. a. t a / 2 and n = 18 for the 99% confidence interval for the mean b. t a / 2 and n = 23 for the 95% confidence interval for the mean c. t a / 2 and n = 15 for the 98% confidence interval for the ...A study found that 73% of prekindergarten children ages 3 to 5 whose mothers had a bachelor’s degree or higher were enrolled in center-based early childhood care and education programs. How large a sample is needed to ...
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