CHI Square
Flashcard
•
Science
•
12th Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What does a level of significance of 5% mean?
Back
There's a 5% chance we'll be wrong if we reject the null hypothesis.
2.
FLASHCARD QUESTION
Front
What is the Chi Square value for observed: 10 circles (expected: 12), 20 squares (expected: 18), 30 triangles (expected: 30)?
Back
.55, accept the Null.
3.
FLASHCARD QUESTION
Front
What is the expected number for circles if observed: 10 circles, expected: 12?
Back
12
4.
FLASHCARD QUESTION
Front
If the χ² critical value = 5.99 and the χ² calculated value = 7.35, what is the conclusion?
Back
Reject Ho.
5.
FLASHCARD QUESTION
Front
What is the purpose of a Chi-Square test?
Back
To determine if there is a statistically significant difference between the observed and expected values in an experiment.
6.
FLASHCARD QUESTION
Front
What is the formula for calculating Chi Square?
Back
χ² = Σ((O - E)² / E) where O = observed frequency, E = expected frequency.
7.
FLASHCARD QUESTION
Front
What does it mean to reject the null hypothesis?
Back
It means there is sufficient evidence to suggest that the observed data significantly differs from the expected data.
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