The 2016 Minneapolis Resident Survey was a questionnaire that the City of Minneapolis issued to its randomly chosen residents. In this survey, 1,155 of the 2,307 respondents (50.1%) rated their neighborhood as a very good place to live. After adjusting for the demographic characteristics of the population, the City of Minneapolis concluded with 95% confidence that the true proportion of all residents considering their neighborhood as a very good place to live is between 0.44 and 0.50.
Which of the following statements are correct?
a. The Minneapolis Resident Survey was an observational study.
b. The Minneapolis Resident Survey was an experiment.
c. Figure 50.1% is a descriptive statistic for the sample.
d. Figure 50.1% is a statistical inference for the population.
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