DE Statistics Final Review
Flashcard
•
Mathematics
•
12th Grade
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the standard deviation?
Back
A measure of the amount of variation or dispersion in a set of values.
2.
FLASHCARD QUESTION
Front
How do you calculate the probability of A or B when A and B are independent?
Back
P(A or B) = P(A) + P(B) - P(A and B) = P(A) + P(B) since A and B are independent.
3.
FLASHCARD QUESTION
Front
What is the formula for determining sample size for estimating a proportion?
Back
n = (Z^2 * p * (1-p)) / E^2, where Z is the Z-score, p is the estimated proportion, and E is the margin of error.
4.
FLASHCARD QUESTION
Front
What is an observational study?
Back
A study where the researcher observes and measures behavior without manipulating any variables.
5.
FLASHCARD QUESTION
Front
What is confounding in experimental design?
Back
When the effects of two or more variables are mixed, making it difficult to determine the individual effect of each variable.
6.
FLASHCARD QUESTION
Front
What is the purpose of a control group in an experiment?
Back
To provide a baseline for comparison against the experimental group.
7.
FLASHCARD QUESTION
Front
What is the difference between a survey and an experiment?
Back
A survey collects data without manipulation, while an experiment involves manipulation of variables to observe effects.
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