The Division of Traffic and Parking at a large university wants to know the percentage of students who used the campus bus system last week. They take a random sample of four hundred students from their list of students with parking stickers and find that 20% of them have used the bus system during the past week. The results of this survey are reported as follows: With 95% confidence, the percentage of students using the bus system lies in the range 20% 4%.

what is the followingcomponents of the problems?

parameter: population: sample: statistic: sampling frame: margin of error:

Question 2:

(T or F) Simple random samples give an unbiased picture of the sampling frame.