prob vocab
Qualitative
hair colo
Quantitative
how old you are
Systematic Sample
the researcher selected every 8th person for his survey
Parameter
estimated 35% of all people in New York City have cars
observation study
- watch a boy all day to see how many times he uses the bathroom
sample
35 out of 1700 who live in new york city are asked about their jobs
Convenience Sample --
Someone standing outside of KFC asking people if they like fried chicken.
Cluster Sample
At the end of every school year, the state administers a reading test to a sample of third graders. The school system has 20,000 third graders, grouped in 1000 separate classes. Assume that each class has 20 students. This year, the test was administered to each student in 36 randomly-sampled classes
Statistic
In a random sample of New Yorkers, 35% own cars
Simple Random Sample
Willy runs a small company with 10 employees. He decides to pick a simple random sample of 3 employees to go on a business trip. He numbers them 0-9 and uses the random digit table to select the sample.
Simulation
a evacuation drill to see how people would react
experiment
a study of different hats to see which one keeps your head the warmest
Population
all that live in new york city
survey
when we do a kahoot and you ask how the kahoot was at the end
Stratified Sample
you have 3 strata with 100, 200 and 300 population sizes respectively. And the researcher chose a sampling fraction of ½. Then, the researcher must randomly sample 50, 100 and 150 subjects from each stratum respectively.
