Question

A factory has 20 assembly lines producing a popular toy. to inspect a representative sample of 100 toys, quality control staff randomly selects 5 toys from each line's output. was this a simple random sample? a yes, because the toys were selected at random b no, because not all combinations of 100 toys could have been chosen c no, because toys do not come off the assembly line at random d yes, because each toy had an equal chance to be selected e yes, because a stratified sample is a type of simple random sample

Answer 1

This is not a simple random sample because not all combinations of 100 toys could have been chosen. We know that it will be a random sample if all the 100 toys will ne chosen randomly but in this question not all the 100 toys will be chosen. The answer is No, because not all combinations of 100 toys could have been chosen.