A July 2011 Gallup poll based on the responses of 1500 adults indicated that 46% of Americans approve of the job Barack Obama is doing as president. One way to summarize the findings of the poll is by saying, “It is estimated that 46% of Americans approve of the job Barack Obama is doing as president. This estimate has a margin of error of plus or minus 3%.” How could you explain the meaning of this to someone who has not taken a statistics course?
Answer to relevant QuestionsIn February 2002, the Associated Press quoted a survey of 3000 British residents conducted by YouGov.com. It stated, “Only 21% wanted to see the monarchy abolished, but 53% felt it should become more democratic and ...When a GSS asked 1326 subjects, “Do you believe in heaven?” (coded HEAVEN), the proportion who answered yes was 0.85. From results in the next section, the estimated standard deviation of this point estimate is 0.01. a. ...a. Show how the t -score for a 95% confidence interval changes as the sample size increases from 10 to 20 to 30 to infinity. b. What does the answer in part a suggest about how the t distribution compares to the standard ...The 1996 GSS asked, “How many days in the past seven days have you felt happy?” (This was the most recent year this question was posed.) a. Using the GSS variable HAPFEEL, verify that the sample had a mean of 5.27 and a ...In December 2004, a report based on the National Survey on Drug Use and Health estimated that 20% of all Americans of ages 16 to 20 drove under the influence of drugs or alcohol in the previous year (AP, December 30, 2004). ...
Post your question