prob vocab

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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.


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