About Ms. Smith
Ms. Smith is from this big U.S. city.
What is Chicago?
“Which brand of dog food has the most protein per serving?” is this type of question.
What is a non-statistical question?
A researcher asks 300 voters how they plan to vote in an election.
What is a survey?
Which is better for studying opinions about a governor: asking only politically influential people, or selecting people randomly from census data?
What is selecting people randomly from census data?
A selection process where every person has an equal chance of being chosen.
What is random selection?
Her family lineage is from these 2 countries in West Africa.
What is Togo and Nigeria?
“Do people who play card games feel healthier than those who do not?” is this type of question.
What is a statistical question?
Researchers use police records to compare accident rates for truck drivers and SUV drivers.
What is an observational study?
A basketball coach wants to know whether students enjoy the school’s basketball program, but only asks members of the varsity basketball team. The study is flawed because of this.
What introducing bias?
The main reason researchers use random selection when choosing a sample.
What is to make the sample representative of the population?
Her family lineage is also from Russia (Ashkenazi Jew) and these 2 adjacent (next to each other) European countries.
What is Germany and France?
“How many hours of sleep do students at this school get each night?”
What is a statistical question?
Scientists give one group dark chocolate and another group milk chocolate to compare blood flow.
What is an experimental study?
A doctor compares serotonin levels using 10 friends, while a psychologist uses 60 randomly selected participants. The psychologist’s study is better mainly because of this.
What is random selection/random assignment (or a larger, more representative sample)?
In the hip-hop memory study, dividing groups by music preference is a poor method because it may introduce this.
What is bias (or another variable/confounding variable)?
Her partner’s heritage hails from this very small Latin American country.
What is El Salvador?
“How tall is the Eiffel Tower?”
What is a non-statistical question?
This type of study directly influences a variable to see its effect.
What is an experimental study?
A study on school absences within a school district uses information from only one elementary school. This is a weakness because the sample may not do this.
What is represent the whole district?
The BEST way to assign participants to groups in an experiment.
What is randomly assigning participants?
In addition to speaking Spanish, she also speaks this closely related latin language (not as well as she speaks Spanish, though!).
What is French?
A major clue that a question is statistical is that the data will show this.
What is variability (or variation)?
A researcher watches people at a stop sign and records how many fully stop without asking questions.
What is an observational study?
In the television energy-level study, researchers found an association between watching TV and low energy. This is why they could not conclude that watching TV causes low energy levels.
What is other reasons could result in low energy levels (correlation does not equal causation)?
Why selecting only people interested in politics from the capital city may not give accurate results about the governor.
What is that the sample may not represent the entire state?