
Chi Square Practice
Flashcard
•
Mathematics
•
University
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula for calculating degrees of freedom in a chi-square test?
Back
Degrees of freedom (df) = (number of rows - 1) * (number of columns - 1)
Tags
CCSS.HSS.MD.A.2
2.
FLASHCARD QUESTION
Front
What are the null and alternative hypotheses in a chi-square test for independence?
Back
H0: No relationship between variables; Ha: There is a relationship between variables.
3.
FLASHCARD QUESTION
Front
What does a p-value less than 0.05 indicate in a chi-square test?
Back
It indicates that there is significant evidence to reject the null hypothesis.
4.
FLASHCARD QUESTION
Front
What is a chi-square distribution?
Back
A chi-square distribution is a probability distribution that arises in statistics when estimating population parameters from a sample.
5.
FLASHCARD QUESTION
Front
What does it mean if a chi-square test statistic is greater than the critical value?
Back
It means that we reject the null hypothesis.
6.
FLASHCARD QUESTION
Front
What is the significance of the chi-square test in statistics?
Back
The chi-square test is used to determine if there is a significant association between categorical variables.
7.
FLASHCARD QUESTION
Front
What is the relationship between degrees of freedom and the shape of the chi-square distribution?
Back
As degrees of freedom increase, the chi-square distribution becomes less skewed and approaches a normal distribution.
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