from” from” “Ranges “Goes Distorts Significant Substantial NOTE: It is okay to use words for their statistical definitions. Just use synonyms if you’re going to venture outside of that. If you aren’t sure what a word means, avoid using it!! Know how to phrase your analyses of the following (they These to the script! are in your study guide). phrasings help ensure you have covered all important aspects of the analysis in a clear and concise manner! Confidence intervals Confidence levels p-values Interpreting or about p-values Analyzing drawing conclusions of a regression line Interpreting r2 Randomization and a large sample size can solve most of life’s problems they make for better, more accurate, – and more reliable (unbiased) results DO NOT mix up the language of and the language of sampling experiments. For example, subjects of experiments are usually not randomly selected times that’s highly unethical). They however, randomly to groups (at least they be) are, assigned should If you use symbols, DEFINE what that symbol means. OR you can weave the context your symbol into (although one is definitely quicker!) Both ways are acceptable Symbols with definitions Symbols with context interwoven P(A B), where represents being a girl and P(Girl Senior) A B ∩ ∩ represents being a senior = 23, where represents the mean weight of the = 23 μ μ μpiglets of piglets (or mean weight of piglets) population true p1 > p2, where p1 represents the proportion of padults > pchildren true adults who like snacks, and p2 represents the true proportion of children who like snacks For make sure you use (or ) for mean and (or ) for standard deviation sampling distributions, IF YOU DON’T KNOW WHAT SYMBOL TO USE, DON’T USE A SYMBOL AT ALL!! There’s nothing wrong with writing out an answer in words. An incorrect symbol WILL get you docked. For inference problems (confidence intervals and significance test), LOOK for the statement all “assume conditions are met”. If it is not there, you had better check those conditions! Also be on the eye out for is it stated? And for 2-sample problems, is it stated for randomness both – samples? If you’re doing an interval or test, always provide the name of the procedure when you do it!
“Ranges from” “Goes from” Distorts Significant Substantial NOTE: It is okay to use words for their statistical definitions. Just use synonyms if you’re going to venture outside of that. If you aren’t sure what a word means, avoid using it!! to the script! Know how to phrase your analyses of the following (they are in your study guide). These phrasings help ensure you have covered all important aspects of the analysis in a clear and concise manner! Confidence intervals Confidence levels Interpreting p-values Analyzing or drawing conclusions about p-values of a regression line Interpreting r2 Randomization and a large sample size can solve most of life’s problems – they make for better, more accurate, and more reliable (unbiased) results DO NOT mix up the language of sampling and the language of experiments. For example, subjects of experiments are usually not randomly selected times that’s highly unethical). They are, however, randomly assigned to groups (at least they should be) If you use symbols, DEFINE what that symbol means. OR you can weave the context into your symbol Both ways are acceptable (although one is definitely quicker!) Symbols with definitions Symbols with context interwoven P(A ∩ B), where A represents being a girl and B represents being a senior P(Girl ∩ Senior) μ = 23, where μ represents the mean weight of the population of piglets (or true mean weight of piglets) μpiglets = 23 p1 > p2, where p1 represents the true proportion of adults who like snacks, and p2 represents the true proportion of children who like snacks padults > pchildren For sampling distributions, make sure you use (or ) for mean and (or ) for standard deviation IF YOU DON’T KNOW WHAT SYMBOL TO USE, DON’T USE A SYMBOL AT ALL!! There’s nothing wrong with writing out an answer in words. An incorrect symbol WILL get you docked. For inference problems (confidence intervals and significance test), LOOK for the statement “assume all conditions are met”. If it is not there, you had better check those conditions! Also be on the eye out for randomness – is it stated? And for 2-sample problems, is it stated for both samples? If you’re doing an interval or test, always provide the name of the procedure when you do it!
ap_exam_review_packet-tpos_chapters.docx