Which of the following scenarios contain biased samples? Select all that apply.
Select all that apply:
To estimate which presidential candidate is likely to win the vote of a town, Mark collects data by interviewing people leaving a local Christian church.
Kenneth wants to estimate the mean height of students at his school. He collects data by selecting a random group of students within his classroom.
To estimate the male to female ratio of the residents of her city, Janice collects data by recording the sex of every 50th resident after selecting a random starting point on a list of residents.
Amy wants to estimate the mean grade point average of students at her school. She collects data by recording the grade point average of every 25th student on the list of students after a randomly selected first student.
