1. The owners of an amusement park would like to determine what percentage of patrons are returning customers. The customers enter the park one at a time and pass an attendant who takes their tickets. A suitable survey question could be asked at that time. Not every customer would be asked because the attendant wants to keep the line moving at a steady rate. The sampling method that would likely be used is?

2.The lifetimes for a certain brand of light bulb are normally distributed with a mean lifetime of 700 hours and standard deviation of 20 hours. If the light bulb has a z-score of -1.6, then its life time, to the nearest hour, will be?