AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

AP Statistics (Chapter 9) Flashcards

Terms : Hide Images
9741043720Significance TestA formal procedure for using observed data to decide between two competing claimes0
9741043721Null HypothesisThe claim that the given parameter is true.1
9741043722Alternative HypthesisThe claim that the given parameter is NOT true2
9741043723One-SidedIt states that a parameter is larger than the null hypothesis value or states that the parameter is smaller than the null value3
9741043724Two-SidedIt states that the parameter is different from the null hypothesis value (it could be either larger or smaller)4
9741043725P-ValuesThe probability that the statistic would take a value as extreme as or more extreme than the one actually observed.5
9741043726Reject the Null Hypothesisif the observed result is too unlikely to occur just by chance.6
9741043727Fail to Reject Null Hypothesisif the observed result is fairly likely to occur just by chance.7
9741043728Statistically Significant at the Level (alpha)If the p-value is smaller than alpha (typically a = 0.05)8
9741043729Type I ErrorIf we reject the null hypothesis when the null hypothesis is true9
9741043731Type II ErrorIf we fail to reject the null hypothesis when the alternative hypothesis is true10
9741043733Test StatisticZ-score for a statistic.11
9741043735Significance Test - four step processSTATE: what hypotheses do you want to test, and at what significance level? PLAN: Name test. Check conditions. DO: -compute the test statistic -find the p-value CONCLUDE: make a decision about the hypotheses in the context of the problem12
9741043737One-sample z test for a proportionFinds the P-value by calculating the probability of getting a z statistic this large or larger in the direction specified by Ha.13
9741043738PowerThe _________________ of a test against a specific alternative is the probability that the test will reject the null hypothesis at a chosen significance level alpha when the specified alternative value of the parameter is true. We made the correct decision.14
9741043740One-sample t testUse this test to test a claim regarding a single mean (WHEN THE STANDARD DEVIATION OF THE POP IS UNKNOWN)15
9741043741Paired DataStudy designs that involve making two observations on the same individual or one observation on each of two VERY similar individuals result in ...16
9741043742Paired t proceduresWhen paired data result from measuring the same quantitative variable twice, we can make comparisons by analyzing the differences in each pair. If the conditions for inference are met, we can use one-sample t procedures to perform inference about the mean difference mean(d). These methods are called __________________________________17

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!