Apro-evolution advocate wants to estimate the percentage of people who favor teaching only evolution in schools. she conducts a nationwide survey of 1980 randomly selected adults 18 years and older. the interviewer asks the respondents, "do you favor promoting science by teaching only evolution in schools? " which type of bias is this?

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.