Experimental Design
Sampling Method
Experimental or Observational?
Naming and Definitions
Random
100
Participants are randomly assigned to treatments.
What is Completely Randomized (Design)?
100
The population consists of "n" objects. The sample consists of "n"objects. If all possible samples of "n" objects are equally likely to occur
What is Simple random?
100
A Clinical Trial to compare two drugs and assigning subjects to drug A, Drug B, and Drug C, a placebo.
Experimental
100
This name for a treatment can be used for a fake treatment. Ex: Sugar Pill.
What is a Placebo?
100

How many batman movies are there in total?

Seven

200
Experimenter randomly puts subjects in subgroups based on similar characteristics, to determine their treatment subgroup.
What is Randomized Block (Design)?
200
population is divided into groups, based on some characteristic. Then, within each group a sample is taken.
What is Stratified Sampling?
200
In an attempt to study the health effects of air pollution, a group of researchs selected 6 cities in very different environments — some from an urban setting (e.g. greater Boston), some from a heavy industrial setting (e.g. eastern Ohio), some from a rural setting (e.g. Wisconsin). Altogether they selected 8000 subjects from the 6 cities, and followed their health for the next 20 years. At this time their health prognoses were compared with measurements of air pollution in the 6 cities.
Observational
200

This type of random sampling refers to a sampling method in which the total population is divided into non-overlapping subgroups. Each of the subgroups is called a stratum, and two or more subgroups are called strata.

What is Stratified random sampling?

200

What team has the most NBA championships?

What is the Celtics?

300
Experiment has only two treatment conditions; and participants can be grouped into pairs, based on some similar characteristic. Then, within each pair, participants are randomly assigned to different treatments.
What is Matched Pairs?
300
every member of the population is assigned to one, and only one, group. sample of groups is chosen, only subjects within sampled groups are surveyed.
What is Cluster Sampling?
300
A group of researchers want to know whether sudden natural rise of carrots in an area will affect rabbit populations. They examine their populations over the course of 2 years. then collect data and compare to previous years.
Observational
300
Population is divided into "N" groups, which are called____
Clusters
300

What NFL team hired the first cheerleaders in 1972?

Who are the Cowboys?

400
What type of experiment is this: A group of researchers want to see which dog food brad is better, A or B. 6 dogs consist of 3 breeds: Pit bull, Chihuahua, and Great Dane. Of the six dogs, these dogs are put into pairs of the same breed and then are randomly assigned to one of the two different food brands. Data is collected and compared for the 3 breeds of dog.
What is Matched Pairs?
400
Every "nth" person.
What is Systematic Sampling?
400
Example 1. A clinical trial is set up to compare a proposed new drug with a placebo (some inert substance that is given to make people think they are talking a drug when they are not). 50 patients are recruited, and we randomly select 25 of them to receive the new drug, the rest receiving the placebo. After some period of time the two groups are compared to see whether the group receiving the new drug has recovered from the disease under study.
Experimental
400

means keeping other variables constant for all experimental units.

What is a control experiment?

400

When is the AP STATS Exam?

Cinco de Mayo! (May 5)
500
CVS wants to know whether or not their new line of cough drops is more effective than their old one. (A is new, B is Old) CVS outs 900 subjects into a hat, then picks out 300 to use product A, 300 for B, ad 300 for a placebo brand that does nothing. They then compare the data at the end to see which is better.
What is Completely Randomized?
500
An auto analyst is conducting a satisfaction survey, sampling from a list of 10,000 new car buyers. The list includes 2,500 Ford buyers, 2,500 GM buyers, 2,500 Honda buyers, and 2,500 Toyota buyers. The analyst selects a sample of 400 car buyers, by randomly sampling 100 buyers of each brand. Is this an example of a simple random sample? (A) Yes, because each buyer in the sample was randomly sampled. (B) Yes, because each buyer in the sample had an equal chance of being sampled. (C) Yes, because car buyers of every brand were equally represented in the sample. (D) No, because every possible 400-buyer sample did not have an equal chance of being chosen. (E) No, because the population consisted of purchasers of four different brands of car.
The D!
500
Free 500 Points :)
:)
500

means using enough experimental units to distinguish a difference in the effects of the treatments from chance variation due to the random assignment.

What is a replication?

500

Finish the lyrics from The Weeknd "Blinding Lights": "Sin City's cold and empty, no one's around to _______."

judge me

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