AP Statistics chapter 9
Flashcard
•
Mathematics
•
9th Grade - University
•
Practice Problem
•
Hard
Standards-aligned
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1.
FLASHCARD QUESTION
Front
What is a p-value in hypothesis testing?
Back
A p-value is the probability of obtaining test results at least as extreme as the observed results, assuming that the null hypothesis is true.
2.
FLASHCARD QUESTION
Front
What does it mean to reject the null hypothesis?
Back
Rejecting the null hypothesis means that there is sufficient evidence to support the alternative hypothesis.
3.
FLASHCARD QUESTION
Front
What is the significance level (α) in hypothesis testing?
Back
The significance level (α) is the threshold for determining whether a p-value indicates significant evidence against the null hypothesis, commonly set at 0.05.
4.
FLASHCARD QUESTION
Front
What is a Type I error?
Back
A Type I error occurs when the null hypothesis is true, but is incorrectly rejected.
5.
FLASHCARD QUESTION
Front
What is a Type II error?
Back
A Type II error occurs when the null hypothesis is false, but is incorrectly failed to be rejected.
6.
FLASHCARD QUESTION
Front
What is the purpose of a one-sample t-test?
Back
A one-sample t-test is used to determine if the mean of a single sample is significantly different from a known or hypothesized population mean.
7.
FLASHCARD QUESTION
Front
What is the difference between a one-sample z-test and a one-sample t-test?
Back
A one-sample z-test is used when the population variance is known and the sample size is large, while a one-sample t-test is used when the population variance is unknown and the sample size is small.
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