Name the Bias
Nerds want to know how many hours per day students Play Clash Royale at IDEA Walzem. To collect data for the study, they randomly pick names from Instagram and message people to ask them about their Clash consumption.
Undercoverage Bias
Mr. Gutierrez wants to estimate the average number of hours his AP Statistics students study each week. He has a class roster of 30 students.
Simple Random Sample
Researchers randomly assign one group of students to watch a comedy movie and another group to watch a documentary. They then measure their mood levels afterward.
Experiment Treatment (Movie)
Who is the main character of "Death Note"
Light Yagami
What does Mr. Gutierrez say at the beginning of class as he closes the door?
ALRIGHT GUYS!!!!!!
Do you Like the Great, amazing, spectacular, one-of-a-kind Mr. Gutierrez in Awesome 6,7 Statistics, or Mr. Uribe’s teaching in Mid English?
Question Wording Bias
Mr. Gutierrez wants to estimate how much time students spend studying for AP Statistics each week. so, he chooses 5 students who he believes are “typical” based on class participation and grades.
Judgement Sample:
1. Biased, inaccurate (tends to overestimate). This is because it’s not a random sample.
2. Variability doesn’t matter because biased estimates are trash.
A film club looks at past attendance records to see if students who watched action movies attended more meetings than those who watched dramas.
Study (Retrospective)
Who is the famous musician that Miguel admires?
Ernesto de la Cruz
What picture did MR. Gutierrez ask you guys to save on your phone for extra Credit?
Rock Paper Scissors Table
A high school sends out a survey to all students asking how satisfied they are with the school lunch program. However, only 30% of students respond to the survey.
Nonresponse Bias
A school counselor wants to understand student stress levels across different grade levels. The school has 100 students in each grade: 9th, 10th, 11th, and 12th. To ensure fair representation, the counselor randomly selects 25 students from each grade level to participate in a survey.
Stratified Random Sample: The population was divided into strata based on grade level, and then a random sample was taken from each stratum. This ensures that each grade is equally represented in the survey.
A school follows a group of students over the next year to see how their movie-watching habits affect their academic performance.
Study (Prospective)
What is the name of Naruto’s father?
Minato Namikaze
When is Mr. Gutierrez Birthday
October 10, 2001
A gaming YouTuber channel posts a poll asking viewers if they can beat him a 1V1 Valorant:
“can you beat a professional gamer in an online match?”
Voluntary response bias:
A school district wants to evaluate the effectiveness of a new math curriculum. Instead of selecting individual students from across all schools, they randomly select 5 entire classrooms from different schools and survey every student in those selected classrooms.
Cluster Random Sample:The population was divided into clusters (classrooms), and then entire clusters were randomly selected. Every member of the selected clusters was included in the sample.
A psychology researcher randomly assigns students to watch either a horror movie or a romantic comedy, then measures their heart rate and stress levels during and after the film.
Experiment,Treatment (movie type) is imposed and physiological responses are measured.
What is the name of Plankton’s computer wife?
Karen
What Packs did Mr. Gutierrez use to Open in AP Precalculus along with De Leon?
One Piece Card packs
Mr. Gutierrez gives his AP Statistics students a survey asking:
“How many hours do you study for this class each week?”
Students are asked to report their own study time.
Self-reported response bias
A film club wants to survey students about their favorite movie genres. They have a list of 300 club members sorted by last name. Starting with the 5th person on the list, they select every 10th student to complete the survey.
Systematic Random Sample: The sample was chosen using a fixed interval (every 10th student) starting from a random starting point (the 5th student), which is the key feature of systematic sampling.
A school district wants to understand how movie-watching habits differ across grade levels. They randomly select 50 students from each grade and ask them to log their movie-watching for one month. No changes are made to their behavior.
Study (Prospective Observational)
Zoro only became a member of the Straw Hat Pirates for this reason
To defeat Hawk Eye and become the greatest swordsman
What is Gutierrez Favorite Music Artist
Easy: Alex Warren or Mike Posner
Moderate: Christian Nodal or Eminem
Hard: Ariel Camacho or Avicii