AMDM Unit 4 Test Fall 2024
Flashcard
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the mode of a data set?
Back
The mode is the value that appears most frequently in a data set. For example, in the data set 88, 94, 82, 91, 85, 82, 121, 118, 81, 85, 92, 77, 69, 50, the modes are 82 and 85.
2.
FLASHCARD QUESTION
Front
What is an observational study?
Back
An observational study is a type of research where the researcher observes and collects data without manipulating any variables. For example, gathering data from 15 school districts to study the link between attendance and grades.
3.
FLASHCARD QUESTION
Front
What is an experiment in research?
Back
An experiment is a study in which the researcher manipulates one or more variables to determine their effect on another variable. For example, testing the correlation between sleep hours and SAT scores by having groups of students sleep for different hours.
4.
FLASHCARD QUESTION
Front
What is the placebo effect?
Back
The placebo effect is a psychological phenomenon where a person experiences a change in their condition due to the belief that a treatment will be effective, even if the treatment has no actual therapeutic effect.
5.
FLASHCARD QUESTION
Front
What is a survey in research?
Back
A survey is a method of collecting data by asking people questions. For example, collecting data from students about their SAT Prep class attendance and SAT scores.
6.
FLASHCARD QUESTION
Front
What is the difference between a sample and a population?
Back
A sample is a subset of a population used to represent the whole. A population includes all members of a specified group. For example, surveying 20 students from a school is a sample of the entire student population.
7.
FLASHCARD QUESTION
Front
What is correlation in statistics?
Back
Correlation measures the relationship between two variables. A positive correlation means that as one variable increases, the other also increases, while a negative correlation means that as one variable increases, the other decreases.
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