Connecting students to college success the college board is a notforprofit membership association whose mission is to connect students to college success and opportunity. Mean expected value of a discrete random variable video. Connecting students to college success the college board is a notforprofit membership association whose mission is to connect students to college success and. A onesemester, introductory, noncalculusbased college course in statistics. Founded in 1900, the association is composed of more than 5,400 schools, colleges, universities, and other. Our ap statistics flashcards each contain one question that might appear on the ap statistics exam. Free response 19 the following problem is modeled after actual advanced placement statistics free response questions.
The multiple choice section should take you around 90 minutes, and has 40 questions for you to answer. Chapter 11 understanding randomness how are random numbers. The practice of statistics tps was the first book written specifically for the advanced. Ap statistics 2019 freeresponse questions ap students the. For more information on exam weighting, download the ap statistics course and exam description ced. Most statistical studies examine data on more than one variable. Both sections contribute to 50% of your final mark. Y ou wil l be al low ed t o use the fol lowing resourc es on select quizzes and exams a s w e proc eed through the course. Timesaving lesson video on discrete random variables with clear explanations and tons of stepbystep examples. For instance, if we wish to compare bioavailabilities of various dosage forms, the dependent variable would be. Scoring guidelines for each of the sample free response questions in the ced are also available. Experimental design and analysis cmu statistics carnegie.
Ap statistics 2007 scoring guidelines the college board. An introduction to the science of statistics arizona math. When you have a response variable, it is always paired with one or more explanatory variables. Probability rules a sample space contains all the possible outcomes observed in a trial of an experiment, a survey, or some random phenomenon. Like the previous four editions, tps 5e is organized to closely fol low the ap statistics course description. The variable that determines the population a measurement arises from is the independent variable or predictor.
And one way to think about it is, once we calculate the expected value of this variable, of this random variable, that in a given week, that would give you a sense of the expected number of workouts. We recommend counting on albert for any online ap statistics prep. This page contains useful information on the ap statistics course. If this new plotusing the transformed response variablelooks linear, then we can perform. Choose stat calclin reg l1, l2, optional y1 varsyvars11. Exploring one variable statistics with the ti 84 calculator. Now, lets look at some strategies and tips for how to achieve your ap stats goals. In statistics, a response variable is the variable about which a researcher is asking a question. Discrete random variables random variable a random variable is a variable whose value is a numerical outcome of a random phenomenon. Understanding randomness rnbriones concord high simulation consists of a sequence of random outcomes that model a situation component the basic building block of simulation outcomes possible results, occur at random trial the sequence of eventscomponents we want to investigate response variable. Essentially correct e if the response satisfies the following three components. This chapter begins by discussing what statistics are and why the study of statistics.
R free response question 3 r scoring guideline r student samples. Provides a correct possibly generic interpretation of r2. Ap stats unit 6 exam free response ap statistics unit 6. The yintercept is the coefficient labeled constant, and the slope is the coefficient of the explanatory variable. This is akin to the graph with coordinates x, ax, which is a line with slope a. Ap statistics 2019 scoring guidelines question 1 continued spread. Ap statistics student resource packet the fol lowing formula s and tables are similar t o the ones which wil l be pro vided t o you on the a dvanc ed plac ement exam. This is just a extra copy of the formula sheet just in case youve lost your formula sheet that your ap statistics teacher gave to you. Here you can access homework assignments as well as work and notes covered in class each week. Random numbers generated by a calculator or computer are pseudorandom.
They are neither the explanatory nor response variable of interest, but a third variable that lurks beneath the surface, making the. The purpose of this ap course is to introduce students to the major concepts and tools for collecting, analyzing and drawing conclusions from data. Ap statistics flashcards ap statistics flashcard questions. Choose the one alternative that best completes the statement or answers the question. Adminstrators of the fire department are concerned about the possibility of implementing a new property tax to raise. Correlation focuses primarily of association, while regression is designed to help make predictions. This is the regularly scheduled date for the ap statistics exam. The variable of interest is the number of trials required to obtain the first success. It tells us all the values a variable can take, and how often it takes those values. Chapter 11 understanding randomness how are random. Designing studies page 1 of 3 ap statistics chapter 4 designing studies 4.
Ap statistics textbooks, software, resource books, exam. College board, advanced placement program, ap, ap central, and the acorn logo. Encourage your students to visit the ap statistics student page for exam information and exam practice. If you are giving the alternate exam for late testing, say. The second is a often used as a tool to establish causality. Analyzing two variable quantitative data when the data is in a curved pattern. The effects of glucosamine and chondroitin can be assessed by comparing the responses for these two treatment groups with those for the control group. In statistics, the response variable is the variable you are measuring and trying to explain.
Although these variables are related, there are important distinctions between them. The manager of a local fastfood restaurant is concerned about customers who ask for a water cup when placing an order but fill the cup with a soft drink from the beverage fountain instead of. For example, with an n of 10, it is possible to have a p of 0. View test prep ap stats unit 6 exam free response from history government at boulder high school. After the exam, you can teach the last chapter, which covers more. Connecting students to college success the college board is a notforprofit membership association. He or she wants to know if this variable responds to other factors being examined. You can use them to get a comprehensive overview of each topic covered on the ap statistics exam one problem at a time, or to do problem drills that focus on particular problem types or content areas found on the ap statistics exam. A synonym for outcome variable is dependent variable, often abbreviated.
Ap statistics course and exam description, effective. See notes following sections 2, 3, and 4 for additional guidance in holistic scoring of this question. Ap statistics unit 06 notes random variable distributions. The college board is a missiondriven notforprofit organization that connects students to college success and opportunity. Introduction to biostatistics university of florida. The sum of the probabilities for all possible outcomes in a sample space is 1. If a response is between two scores for example, 2. A response recognizing all values in the sample fall between 100 and 350 square feet or between 4 and 315 square feet satisfies component 3 only for these exact endpoints and need not appeal to a specific measure of spread such as range or interquartile range iqr. Free response the following problem is modeled after actual advanced placement statistics free response questions. Suppose that y is a response variable plotted on the vertical axis and x is an explanatory variable plotted on the horizontal axis. Ap statistics 2008 scoring guidelines the college board. The free response part lasts ninety minutes and contains six questions. If we take the logarithm of the response variable, then plot the new ycoordinates against the original xcoordinates, then the points will be of the form x, xlna. For example, all registered voters in a given county.
Ap statistics syllabus course overview ap statistics is a yearlong introductory course to statistics for students who have successfully completed at least trigprecalculus or algebra iiitrig. Discrete random variable a discrete random variable x has a countable number of possible values. One of the many ways that variables in statistics can be classified is to consider the differences between explanatory and response variables. Enter data into list 1, and then press 1var stats l1.
Scoring guidelines for each of the sample freeresponse questions in the ced are also available. The ap statistics exam is three hours long and consists of 40 multiplechoice questions and six freeresponse questions. The practice of statistics tps was the first book written specifically for the advanced place ment ap statistics course. For quantitative relationships, x explanatory variable or predictor and y response variable or predicted. The course content outlined below is organized into commonly taught. How can the discipline of statistics be used to search for patterns and. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Ap statistics scoring guidelines from the 2019 exam. The researcher wants to use grade level to explain differences in height. Youll be able to cover all the ap statistics topicsbefore the ap exam. Ap statistics scoring guidelines from the 2018 exam. The probability of an outcome is a number between 0 and 1 inclusive. With the first 11 chapters, youll give students the concepts, skills, explanations, and experiences they need to learn and retain the material tested on the ap exam.
This is the exact same formula sheet you are allowed to use during the ap statistics exam. But what we care about in this video is the notion of an expected value of a discrete random variable, which we would just note this way. Examples of distributions race proportion white 62. The variable s we measure as the outcome of interest is the dependent variable, or response. To view the assignment calendars and syllabus, click on that link in the left margin. Linear regression page 1 of 18 ways to obtain a best fit line in a calculator, put x in l1 and y in l2. Surveys and samples population, census and sample the population in a statistical study is the entire group of individuals we want information about. The manager of a local fastfood restaurant is concerned about customers who ask for a water cup when placing an order but fill the cup with a soft drink from the beverage fountain instead of filling the cup with water. It is wednesday afternoon, may 16, and you will be taking the ap statistics exam.
After you generate your response, view two example solutions and determine whether you feel they are complete, substantial, developing or minimal. Or the student does not recognize that both variables are associated with variation in the response variable. Distributions a distribution can be a table or a graph. A response variable measures an outcome of a study. Differences between explanatory and response variables. To prepare well for ap stats exam questions, its important to take practice exams and know how to grade them so you can estimate how well youd do on the actual test. Paperback royalties go to openintro, and the optional leanpub pdf contributions go to authors to fund their time on this book. Ap statistics 2007 scoring guidelines college board. The ap statistics exam is three hours long and consists of 40 multiplechoice questions and six free response questions.
The variables we measure as the outcome of interest is the dependent variable, or response. It is wednesday morning, may 23, and you will be taking the ap statistics exam. Ap statistics 2008 scoring guidelines college board. Your task is to generate a complete, concise response in 15 minutes. Founded in 1900, the college board was created to expand access to higher education.