A sample statistic and margin of error are given. Find the c…

A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question.In a survey conducted in a certain city it was found that 5.0% of men and 5.7% of women were unemployed. The margin of error for each report was 0.6 percentage points. Use each sample statistic to find a confidence interval. Can we conclude that the unemployment rate is higher amongst women than amongst men?

Use the guidelines to evaluate the study. From the informati…

Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?A fitness company conducted a study to test the effectiveness of its new weight-loss supplement. 400 adults looking to lose weight were selected at random and randomly assigned to either a group receiving the supplement or a placebo group. The experiment was double blind. The results were analyzed by researchers employed by the fitness company.

Solve the problem.For the study described below, identify th…

Solve the problem.For the study described below, identify the sample.A researcher is interested in the level of stress among emergency-room nurses in the U.S. 275 emergency-room nurses were interviewed to determine their level of stress. Each nurse was assigned a stress rating based on his or her answers to a number of questions. The average stress rating for the 275 nurses was determined.