Answer to Question #342265 in Statistics and Probability for Yashu

Question

A survey was taken of 800 randomly selected students asking them if they used public transportation to get to class. 120 answered that they did. Construct a 95% confidence interval for this proportion.

1. Please take a piece of paper and write down the process of establishing confidence interval step by step.

2. According to past experience, 20% of students took public transportation. Test if the situation changed. Solve the problem step by step.

Answer 1

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