1) A simple random sample of 102 engineering students was taken from a population of 750 engineering majors. It was found that out of these 102 students, 4 were civil engineering majors and 53 were electrical engineering majors. Find 68% con dence intervals for (a) the percentage of civil engineering majors (b) the percentage of electrical engineering majors, or explain briefly why these cannot be determined from our sample.

(2) Someone working for a survey organization approached the rst 100 students they saw on campus, and noted that 52 of these students were female and 48 of these students were male. From the Registrar's data for that year, 25,000 students were enrolled, and 62% were male. Was this sampling procedure like taking a simple random sample? Explain your answer briefly.

3) In a game of chance, a numb