Arecent survey of 50 executives who were laid off during a recent recession revealed it took a mean of 26 weeks for them to find another position. the standard deviation of the sample was 6.2 weeks. construct a 95% confidence interval for the population mean.

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.