Question

gary wanted to determine the average height of boys at the high school. his older brother is on the bask so he asked him to measure his teammates. after interpreting the results, gary determined the average h high - school - aged boy to be 6 feet, 1 inch. would you consider these results to be valid? yes, because only high - school boys were surveyed. yes, because the results were obtained randomly by measuring the boys basketball team. no, because boys on the basketball team are likely to be taller than the average high school boy. no, because there are no girls surveyed.

Explanation:

Gary's sample is biased: basketball team members are not representative of all high school boys, as they are likely taller on average. The other options are incorrect because the sample is not random or representative, and excluding girls is irrelevant since the goal is to measure boys' average height.

Answer:

No, because boys on the basketball team are likely to be taller than the average high school boy.