Statistics longtest for Finals
Flashcard
•
Mathematics
•
11th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a t-test?
Back
A statistical test used to compare the means of two groups, especially when the sample size is small and the population standard deviation is unknown.
2.
FLASHCARD QUESTION
Front
What is a z-test?
Back
A statistical test used to determine if there is a significant difference between the means of two groups when the sample size is large and the population standard deviation is known.
3.
FLASHCARD QUESTION
Front
What does a correlation coefficient of +1 indicate?
Back
A perfect positive linear relationship between two variables.
4.
FLASHCARD QUESTION
Front
What is a parameter in statistics?
Back
A numerical value that summarizes a characteristic of a population, such as the population mean.
5.
FLASHCARD QUESTION
Front
What is a statistic in statistics?
Back
A numerical value that summarizes a characteristic of a sample, such as the sample mean.
6.
FLASHCARD QUESTION
Front
What is the null hypothesis (H0)?
Back
A statement that there is no effect or no difference, and it is the hypothesis that researchers aim to test.
7.
FLASHCARD QUESTION
Front
What is the alternative hypothesis (Ha)?
Back
A statement that indicates the presence of an effect or a difference, opposing the null hypothesis.
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