A language school owner takes an SRS of 10 of the 72 Introductory Spanish classes offered by the school. Each student in each of the sampled classes is given a vocabulary test and is also asked whether he or she is planning a trip to a Spanish-speaking country in the next year. The data are in file spanish.dat.
- Estimate the total number of students planning a trip to a Spanish-speaking country in the next year, and give a 95% CI.
- Estimate the mean vocabulary test score for Introductory Spanish students in the language school, and give a 95% CI.