Alejandro wants to determine the average shoe size of all of the male students in his school. which sample is likely to yield the most biased results?

a. every tenth boy on the school’s phone list
b. every member of the boys’ basketball team
c. every boy in a randomly selected ninth-, tenth-, eleventh-, and twelfth-grade gym class
d. every fifth boy who walks through the front doors of the school in the morning

The value of cos 30° is the same as which of the following?

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?

Select the correct statement about the function represented by the table