ap stats

✍️ Free Response Questions (FRQs)

👆 Unit 1 - Exploring One-Variable Data

✌️ Unit 2 - Exploring Two-Variable Data

🔎 Unit 3 - Collecting Data

🎲 Unit 4 - Probability, Random Variables, and Probability Distributions

📊 Unit 5 - Sampling Distributions

⚖️ Unit 6 - Inference for Categorical Data: Proportions

😼 Unit 7 - Inference for Qualitative Data: Means

✳️ Unit 8 Inference for Categorical Data: Chi-Square

📈 Unit 9 - Inference for Quantitative Data: Slopes

🧐 Multiple Choice Questions (MCQs)

✏️ Blogs

Best Quizlet Decks for AP Statistics

- Unit 1 Key Terms (15-23%): Exploring One-Variable Data
- Unit 2 Key Terms (5-7%): Exploring Two-Variable Data
- Unit 3 Key Terms (12-15%): Collecting Data
- Unit 4 Key Terms (10-20%): Probability, Random Variables, and Probability Distributions
- Unit 5 Key Terms (7-12%): Sampling Distributions
- Unit 6 Key Terms (12-15%): Inference for Categorical Data: Proportions
- Unit 7 Key Terms (10-18%): Inference for Quantitative Data: Means
- Unit 8 Key Terms (2-5%): Inference for Categorical Data: Chi-Squared
- Unit 9 Key Terms (2-5%): Inference for Quantitative Data: Slopes
- Closing Thoughts

#exploringdata

#anticipatingpatterns

⏱️ **2 min read**

written by

kanya shah

June 8, 2020

✏️Planning a study involves identifying what type of sampling method you’d like to use, who/what your population is, and ruling out steps that would result in false results.

**Population: **it is the entire group of individuals we’d like to gain information about within a statistical study.

**Census: **collects data from every individual in a population. This is extremely time consuming and expensive.

**Sample: **a small portion of the population from which we collect data.

*an individual can be an object, company, etc. Not limited to organisms.

To make a conclusion about a certain population, begin by planning out a sample survey by identifying the population. A **sample survey** is a study that collects data from a sample that is chosen to represent a specific population. Determine what you’d like to measure from the population you’ll be choosing a sample from.

**🔭****Observational Studies**** **observe individuals and measure variables of interest but don’t attempt to influence the responses. In other words, these studies look for association between variables *not causation* because in a study, no treatment is imposed so you cannot assume that one variable caused a certain outcome. You can establish a plausible **relationship or association **between two variables depending on whether the data is valid. The data you collect can only be applied to the population of generalization or the population that your sample researched. Observational studies associations often fail because of confounding between the explanatory and response variables.

**👀Confounding **occurs when two variables are associated in a way that their effects on the response variable cannot be deciphered from each other individually.

*In an experiment, treatments are imposed but in studies, you gather data to examine possible relations between variables.

Courtesy of Tumblr

continue learning

Fiveable Community students are already meeting new friends, starting study groups, and sharing tons of opportunities for other high schoolers. Soon the Fiveable Community will be on a totally new platform where you can share, save, and organize your learning links and lead study groups among other students!🎉

92% of Fiveable students earned a 3 or higher on their 2020 AP Exams.

*ap® and advanced placement® are registered trademarks of the college board, which was not involved in the production of, and does not endorse, this product.

© fiveable 2020 | all rights reserved.