Sampling is a procedure, where in a fraction of the data is taken from a large. Bias in survey sampling in survey sampling, bias refers to the tendency of a sample statistic to systematically over or underestimate a population parameter. Modeling the world chapter 3 a segmented bar chart displays the same information as a pie chart, but in the form of bars instead of circles. Bias due to unrepresentative samples a good sample is representative. Stat plot 1 choose the correct graph to make zoom 9 stat edit puts values into lists stat calc 1. For example, all registered voters in a given county. A target population element that is in the sampling frame is covered undercoverage is the fraction of the total population not covered by the sampling frame ineligible units are those elements in the sampling frame that are not part of the total population. The design of a study is biased if it systematically favors certain outcomes. Teachers are permitted to download the materials and make copies to use with the. If heights of 3 rd graders follow a normal distribution with a mean of 52 inches and a. Displaying and describing quantitative data khan academy. Chapter 1 distribution of a variable tells the values a variable attained and how often. Confidence interval for the sample mean, population std dev known duration.
The intent is to sample three numbers between 1 and 9, the total number in the population. Comparing segmented bar charts is a good way to tell if two variables are independent of one another or not. Ap statistics additional summary updated june 19, 2011 1 sampling and experiment 1. Selection file type icon file name description size revision time user. Ap statistics exam reminders name the ap exam format o. Target populations, sampling frames, and coverage error. The election of 1948 the predictions the candidates crossley gallup roper the results truman 45 44 38 50 dewey 50 50 53 45 objectives. This means that each sample point represents the attributes of a known number of. Explain what is meant by the probability distribution for a random variable. Sample surveys if you dont believe in random sampling, the next time you have a blood test tell the doctor to take it all. Ap statistics formula sheet 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. A maker of fabric for clothing is setting up a new line to finish the raw fabric. The lower bound is your test statistic, and your upper bound is infinity or a very large positive number. The line will use either metal rollers or naturalbristle rollers to raise the surface of the fabric.
Multiple choice questions on normal models and sampling distributions 1. Statistics learning from data page 1 ap edition statistics le a rn i n g f ro m data roxy peck chris olsen table of contents for the digital edition of statistics learning from data. Map census database employee database telephone directory. Ap statistics chapter 12 sample surverys flashcards quizlet.
In column c the first random number in the appropriate interval is 8. Homework questions are assigned from the student text, from ap practice books and from many other sources to coincide with the topic discussed that day. The part of the population that is actually being examined 1. Emphasis should be placed on interpreting information from graphical and numerical displays and summaries. Chapter 1 v 7277000003 ap statistics tg indc2 fonts. Modeling how sample proportions vary from sample to sample is one of the most powerful ideas well see in this course.
This will always cause a deduction in the students score. Entire set of individuals that we are interested in sample. 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 stats chapter 1 notes friday sept 11 exploring data individual objects described by a set of data what is on the xaxis variable characteristic of the individual categorical variable places individuals in groups non numerical quantitative variable. What is the best sampling technique to use for determining the average speed of the cars on a section of highway.
Dec 06, 2014 tps4e narrated power point on section 7. This unit covers some basic methods for graphing distributions of quantitative data like dot plots, histograms, and stem and leaf plots. Are you ready to strut your stuff on the ap world history exam. Ap statistics 2009 scoring guidelines 2009 the college board. Only twelve values are given for each degrees of freedom. The ap statistics exam is designed to test skills, not just knowledge. Students will be able to choose the best method of graphical display and make the appropriate graphs. Ap statistics is an introductory collegelevel statistics course that introduces students to the major concepts and tools for collecting, analyzing, and drawing conclusions from data. The ap stats course focuses on data collection and analysis, as well as the use of data to draw conclusions.
Practically speaking, the key to your ap statistics study plan at this stage is all about consistent effort. Ap statistics 2009 scoring guidelines college board. Chapter 18 reading guide sampling distribution models the central limit theorem for sampling proportions. It is very important for students to make sure their graph displays the data with the proper labels and scaling. The study of an entire population is called a census. Parameter a parameter is a number that describes some characteristic of the population statistic a statistic is a number that describes some characteristic of a sample symbols used sample statistic population parameter proportions. Statistical inference the ap statistics exam format is. Describing patterns and departures from patterns 2030% exploratory analysis of data makes use of graphical and numerical techniques to study patterns and departures from patterns. Start studying ap statistics chapter 12 sample surverys. 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. Ap stats chapter i i rth num cpx under math, prb you will find 5. Sample the population is the entire group you would like to study or draw a conclusion about.
This is the exact same formula sheet you are allowed to use during the ap statistics exam. Many assigned questions ask for explanations to support students conclusions. Use this acronym when being asked to comment on the appearance of or to describe any distribution of single variable data. Students cultivate their understanding of statistics using technology, investigations, problem solving, and writing as they explore concepts like variation and. Learn ap statistics vocabulary sampling distributions with free interactive flashcards. Ap statistics curriculum course outline, timeline and learning objectives graphical and numeric representations of data independent summer work through mid sept. Choose from 500 different sets of ap statistics vocabulary sampling distributions flashcards on quizlet.
Raj, p4 this list is termed as a frame more appropriately list frame by many statisticians. Ap stats chapter 1 notes friday sept 11 exploring data individual objects described by a set of data what is on the xaxis variable characteristic of the individual categorical variable places individuals in groups non numerical quantitative variable numerical values, one can average this data. Learn vocabulary, terms, and more with flashcards, games, and other study tools. A list of subjects from which a sample of subjects is selected. Any numerical value that comes from the population is a parameter. Ifwe wish to compare the average psat scores of boys and girls taking ap statistics at this high school, which would be the best way to gather these data. A sampling frame for voters in a precinct would be the voter registration listing, for example.
The sample size calculation depends primarily on the type of sampling designs used. Surveys and samples population, census and sample the population in a statistical study is the entire group of individuals we want information about. Starting at the top of column a and reading down, two numbers are selected, 2 and 5. Statistics learning from data page 1 ap edition statistics le a rn i n g f ro m data roxy peck chris olsen table of contents for the digital edition of statistics. Designing studies page 1 of 3 ap statistics chapter 4 designing studies 4.
Ap statistics college board website information about the course, including the format of the ap exam and previous years frappys. For instance, to draw a simple random sample of 100 units, choose one unit at random from the frame. The next step is to create the sampling frame, a list of units to be sampled. Modeling the world chapter 2 quantitative variables with units. Using the table you can find an interval of values that contains the pvalue, but not always an exact pvalue.
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