Types of Bias
This response bias occurs when sampling units are unreachable or fail to answer a survey.
What is nonresponse bias?
I decide to select 5 names from a hat to go over a statistics problem on the board. Every student in the class had one name written on a piece of paper and was placed in the hat. This is an example of _______
What is simple random sampling?
An experiment is different from a study because an experiment ________________ on the subjects.
What is imposes treatments?
The part of an experiment that the researcher actively changes about the subjects.
What is treatment?
This is the only fruit that bears it's seeds on the outside.
What is strawberry?
This type of sampling bias occurs when people are asked to call-in and give an opinion.
What is voluntary response bias?
____________ is the result of taking different random samples of the same size from the same population.
What is sampling variability?
Calling 1,000 households and asking their opinion on their favorite cookie is an ____________
What is observational study?
The specific outcome measured at the end of an experiment.
What is response variable?
What is Thomas Edison's most famous invention?
What is the lightbulb?
Jeff decided to poll students in his school about the opinions of sports. He chooses students, at random, from a list of students actively participating in school sports. The results are unreliable due to __________
What is undercoverage?
The best way to limit variability is to ____________
What is increase the sample size?
The reason we keep variables roughly the same in an experiment is to _______________
What is reduce variability?
Janet wants to conduct a study to see if arm span and height are related. She asks her science class to participate in the study. This is an example of ______________
What is convenience sampling?
Which athlete has won the most Olympic medals?
Who is Michael Phelps?
What is the best way to avoid or limit the amount of bias when doing a study or experiment?
What is random sampling?
The purpose of random assignment is to _________
__________ is when an observed difference in responses between the groups in an experiment is so large that it is unlikely to be explained by chance variation in the random assignment.
What is statistically significant?
When can you make an inference about population and cause and effect?
What is when individuals are randomly selected and randomly assigned to groups?
What was the original purpose of the tiny pocket in jeans?
What is to store a pocket watch?
A survey question was asked - "Why is drinking milk good for you?" Pick whether this question would lead to an overestimate or underestimate of the results about milk.
What is overestimate?
_________ is when the control group of a simple random sample produces the same results as the treatment group.
What is the placebo effect?
Random assignment of individuals to groups allows for
inference about ___________
What is cause and effect?
A study found the difference in proportion of .285 was statistically significant. What does this mean?
What is the difference in proportion was large enough that it is unlikely to be explained by chance variation?
How many gifts in total were given in “The Twelve Days of Christmas” song?
What is 364?