Question

roy’s toys received a shipment of 100,000 rubber duckies from the factory. the factory couldn’t promise that all rubber duckies are in perfect form, but they promised that the percentage of defective toys won’t exceed 5%.

roy wanted to get an estimation of the percentage of defective toys, and since he couldn’t go over the entire 100,000 duckies, he took a random sample of 10 duckies. he found that 10% of them were defective.

what type of statistical study did roy use?

choose 1 answer:

a sample study

b experiment

c observational study

Explanation:

Roy took a random sample (10 duckies) from the entire population (100,000 duckies) to estimate the percentage of defective toys. A sample study involves analyzing a subset (sample) to make inferences about the whole population. An experiment involves manipulating variables, and an observational study is about observing without intervention (but here the key is sampling from a population, so sample study is correct).

Answer:

A. Sample study