An Associated Press article written by Rukmini Callimachi pointed out that Nike, the world’s largest maker of athletic shoes, has started to feature female models who are not the traditional rail-thin women who have graced billboards and magazine covers for the last 20 to 25 years. These new models, called “real people,” may be larger than the former models, but they are still very athletic and represent what Nike spokeswoman Caren Ball calls “what is real” as opposed to “what is ideal.” The article also reports on a survey of 1,000 women conducted by Allure magazine in which 91% of the respondents said they were satisfied with what they see in the mirror. Nike managers would like to use these data to develop a 90% confidence interval estimate for the true proportion of all women who are satisfied with their bodies. Develop and interpret the 90% confidence interval estimate.