What type of sampling is in the scenario?
A soccer player interviews his soccer teammates about what athletes think about the atheltic department.
Conveneince
The principal at a school wants to know the proportion of students that did all their homework last night. She selects a simple random sample of 100 students and send an email to each of them asking if they did all their homework last night. Of the 40 responses, 36 of the students said that they did all their homework last night (90%).
TWO ANSWERS (BOTH NEEDED)
Non Response and Response Bias
Get all the students in a senior-only class to participate in a study. Ask them whether or not they took an SAT prep course and divide them into two groups based on their answer to this question.
Can I generalize this experiment to all seniors?
No, as there was no a random sample.
What are experimental units?
what/who treatment is imposed on
Draw the Mascot of Scecina Memorial High School.
I will give you points based on how much I like your drawing.
A principal assesses the NWEA scores from 10 students from each grade.
Stratified Sampling
The mayor of Springfield is interested in finding out the average age of people in the city. He obtains a list of all the landline telephones in the city, and then contacts a simple random sample of 300 people. He uses the sample to estimate the average age of all the people in the city.
TWO ANSWERS
Undercoverage and Non-Response
Select a random sample of students who have taken the SAT from your school to participate in a study. Ask them whether or not they took an SAT prep course and divide them into two groups based on their answer to this question.
Can I prove there is causation between SAT prep course and SAT scores?
No, there is no random assignment.
Difference between observations and experiments.
Experiments have treatment(s).
In order for there to be convicing evidence in an experiment, the results must be statistically significant, which means there must be less than a ___% chance that the results happened purely by chance.
5%
Taylor Swift asks every fan from 4 rows what they woul rate their concert experience.
Cluster
There is a proposal to cut some of the funding for the fire department in a city. One of the firefighters in the city wants to know the proportion of people in his neighborhood who support the budget cuts. He takes a random sample of 30 homes and visits them dressed in his uniform.
Response Bias
Select a random sample of Seniors from your school to participate in a study. Randomly assign half of the students to take an SAT prep course and have the remaining half not take an SAT prep course. Then have both groups take the SAT again.
Can I generalize the results to all seniors at the school?
Yes, random sample
Blinding
When subject (single blind) and/or experimenters (Double blind) don't know who recieved what treatment.
What is the name of this female kpop group from the movie: Kpop Demon Hunters?
Huntr/x
Asking every 5th person if they think a hotdog is a sandwich.
Systematic
A counselor at a large high school wants to learn about student opinion regarding remote learning versus in-person learning. Each of the following sampling methods introduces a possible source of bias. Name and explain the type of bias.
The counselor selects a random sample of students from those who signed up for remote learning.
Undercoverage
Select a random sample of students who have taken the SAT from your school to participate in a study. Randomly assign half of the students to take an SAT prep course and have the remaining half not take an SAT prep course. Then have both groups take the SAT again.
Can I prove there is causation between SAT Prep Course and SAT Scores?
Yes, there is random assignment.
When a fake treatment works.
Placebo Effect
Mr.Wells has how many siblings?
6
Each member of a population (or subset) has an equal chance at being chosen for the sample, and every sample has an even chance at being chosen.
Simple Random Sample
Sike
Sike
Select a random sample of Seniors from your school to participate in a study. Randomly assign half of the students to take an SAT prep course and have the remaining half not take an SAT prep course. Then have both groups take the SAT again.
Can I generalize the results to all the students in the school?
No, only the seniors.
What are the four features of a well-designed experiment?
100 for each correct, 500 for all correct.
Comparison, Random Assignment, Replication, Control
What is the name of Mr.Wells' dog?
Extra for breed.
Leo
Miniature Australian Shepherd