Question: Describe how the width of a 95 confidence interval for
Describe how the width of a 95% confidence interval for a mean changes as the standard deviation (s) of a sample increases, assuming sample size remains the same.
Answer to relevant QuestionsDescribe how the width of a 95% confidence interval for a mean changes as the sample size (n) increases, assuming the standard deviation remains the same. According to the Gallup Poll, 27% of U.S. adults have high levels of cholesterol. Gallup reports that such elevated levels “could be financially devastating to the U.S. healthcare system” and are a major concern to ...Suppose the state in Exercise 35 sampled 16 small retailers instead of 51, and for the sample of 16, the sample mean increase again equaled $ 2350 in additional sales tax revenue collected per retailer compared to the ...Police departments often try to control traffic speed by placing speed- measuring machines on roads that tell motorists how fast they are driving. Traffic safety experts must determine where machines should be placed. In one ...The average age of online consumers a few years ago was 23.3 years. As older individuals gain confidence with the Internet, it is believed that the average age has increased. We would like to test this belief. a) Write ...
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