Stats Test Review

Flashcard
•
Mathematics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a convenience sample?
Back
A convenience sample is a type of non-probability sampling where the sample is taken from a group that is easy to reach. It is often used in surveys and studies where the researcher selects individuals who are readily available.
2.
FLASHCARD QUESTION
Front
What is an observational study?
Back
An observational study is a type of research method where the researcher observes and records behavior or outcomes without manipulating any variables. It is used to gather data in a natural setting.
3.
FLASHCARD QUESTION
Front
How do you calculate a z-score?
Back
A z-score is calculated using the formula: z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation. It indicates how many standard deviations an element is from the mean.
4.
FLASHCARD QUESTION
Front
What is a confounding variable?
Back
A confounding variable is an outside influence that changes the effect of a dependent and independent variable. It can lead to erroneous conclusions in an experiment.
5.
FLASHCARD QUESTION
Front
What is a survey in research?
Back
A survey is a method of collecting data by asking people questions. It can be conducted through questionnaires, interviews, or online forms to gather information about opinions, behaviors, or characteristics.
6.
FLASHCARD QUESTION
Front
What is a simple random sample?
Back
A simple random sample is a sampling method where every individual in the population has an equal chance of being selected. This method helps to eliminate bias in the selection process.
7.
FLASHCARD QUESTION
Front
What is the difference between an experiment and an observational study?
Back
An experiment involves manipulating one or more variables to determine their effect on a dependent variable, while an observational study involves observing subjects without interference.
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