AP Stats Unit 3

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•
Mathematics
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the sample size in a survey?
Back
The sample size is the number of individuals or observations included in the survey. In the Consumer Expenditure Survey, the sample size is the 200,000 households that returned their results.
2.
FLASHCARD QUESTION
Front
What is a simple random sample?
Back
A simple random sample is a sampling method where every individual has an equal chance of being selected. If not all groups have the same chance, it is not a simple random sample.
3.
FLASHCARD QUESTION
Front
What is response bias in surveys?
Back
Response bias occurs when participants provide inaccurate responses, often due to the way questions are asked or the context in which they are asked.
4.
FLASHCARD QUESTION
Front
What is the purpose of stratified sampling?
Back
Stratified sampling is used to ensure that specific subgroups (strata) within a population are adequately represented in the sample.
5.
FLASHCARD QUESTION
Front
What does it mean if a result is statistically significant?
Back
A statistically significant result indicates that the observed effect is unlikely to have occurred by chance, suggesting a real difference or relationship.
6.
FLASHCARD QUESTION
Front
What is the difference between qualitative and quantitative data?
Back
Qualitative data describes characteristics or qualities (e.g., colors, names), while quantitative data involves numerical values that can be measured (e.g., height, weight).
7.
FLASHCARD QUESTION
Front
What is a population in statistics?
Back
A population is the entire group of individuals or instances about whom we hope to learn, while a sample is a subset of that population.
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