A car manufacturer would like to sample cars comng off the assembly line for defects. What type of sampling scheme would be the most efficient? Simple random sampling, number each car in a lot and randomly select n cars to investigate for defects. Convenience sampling, choose the first n cars off of the line beginning after lunch. Systematic random sampling, randomly choose a starting point and test every kth car off of the line. Stratified random sampling, group the cars into type and then randomly sample cars with each type.