Friday, June 19, 2020
Friday, June 12, 2020
SAT Test Standard Deviation
The SAT test standard deviation values for 2015à is 116 points for Critical Reading, 120 points for Math, and 115 points for Writing. More 2015 standard deviation values based on different groups of students (think: race, gender, grade in school, etc.) can be found in this report by the College Board. Unfortunately, the new SAT test standard deviation values for the March SAT arent released; in fact, the College Board probably wont release new SAT test standard deviation values and other test statistics until the end of the year. Okay, thats cool I guessbut what is SAT test standard deviation and why do I need to know this? Standard deviation is a measure of variation or differences between data points in a data set. It is a measurement that shows how spread out the data is in relation to the mean. A big standard deviation means that data is really spread out while a small standard deviation means that the data is grouped closer to the mean (and the way we know if standard deviation is big or small is by comparing two data sets).à Standard deviation is really important on the SAT because it helps create the SAT scoring system and it also helps check that the scoring system is fair. If youve taken the SAT or the PSAT, youll notice that your report always has a percentile with your score, which shows how well you did in comparison to the other students that took the test. This is because the SAT is the type of standardized test that creates its scoring based on trends found in general populations, which can be statistically represented by aà bell curve: The bell curve from theà Interpreting Your SAT Scores infographic reproduced (the numbers represent percentile rank) In a general population, data points that are one standard deviation higher than the mean tend to be at the 84th percentile mark and values that are one standard deviation lower than the mean tend to be at 16th percentile mark. Check out the following image for what data points two standard deviations away from the mean look like: To match these statistical trends, the SAT test makers then made a scoring system that set the average or mean score to 500 (this is the score at the 50th percentile mark) and the standard deviation to 100 points for each section. This means that ideally, students that are scoring at the 84th percentile would get a score of 600 and students that are scoring even higher at 97th would get 700. With a lot of testing and research, the test makers can make sure that the SAT tests have the right questions to achieve these goals. When we look atà the actual SAT Test standard deviation values, we can confirm theyre not too far off from the 100-point standard deviation goal, which is a relief.à A smaller or bigger standard deviation means that the results dont match how the general population is predicted to perform. This could raise flags about the questions. For example, a smaller standard deviation couldà mean that everyone was scoring similarly because the test was too easy or too hard. If it was bigger, it might mean that its testing specific knowledge that some groups of students arent aware of, but others are, which wouldnt be fair. The tl;dr version about SAT test standard deviation If the previous section was just a bit too much statistics for you (and it shouldnt be because standard deviation actually comes up on the SAT!), the important thing to know about SAT test standard deviation is that its one way to make sure that the SAT is being scored fairly. If the variation in real SAT test scores is measured by standard deviations of approximately 100 points, give or take 10 or 20 points, then we can confirm that the test is fairly scored and that it serves the purpose its supposed to serve.
Wednesday, June 10, 2020
Types of Writing an Essay - How to Outline and Write the Body of Your Essay
Types of Writing an Essay - How to Outline and Write the Body of Your EssayThere are basically two types of writing in the essay: the outline and the body. The outline will summarize all information from the essay, while the body will contain your conclusions. In this article we will discuss both of these parts.- An outline will help you organize your thoughts and put them in a form that they can be easier to understand. An outline should have all the points that you will be making in your essay as headings. You should also include paragraphs that will connect the main points with one another. Some people like to list all the points in order of their importance, others feel it's better to list them in their chronological order.- A body is where you go into detail about what you are talking about in your essay. You need to work out a thesis statement that is based on what you are writing about. You should also have a conclusion for each topic that you are covering.- There are two kind s of bodies. One way is to list all the points you are discussing and leave the rest of the body blank. The other way is to write down the points in the order of their importance and then list them one at a time.Now that you know how to outline and write the body, we can look at the most important parts of an essay. The first is the introduction. This is something that you should write down in its entirety. It should introduce yourself and give your reader a brief description of your subject.Next comes the summary. This should present your main point in as few words as possible. It should do this by creating a cloud of words around your main point. Another way to do this is to avoid using the word 'but' in the body of your essay. Instead, you should say something like 'in order to establish the main point...' or 'to emphasize the effect...' This way you show the effect without discussing the cause of it.The last paragraph is your conclusion. Make sure that you get everything in this section in the same order that the parts were stated in the body. Just like the body, you should make sure that you follow this rule when writing the conclusion: avoiding the use of the word 'but.'One more thing you can do to help improve your essay is to reread your essay several times. When you go back over your essay, you will be able to catch typos and other errors that you might have made. By doing this, you will improve your overall writing skills and help you succeed in college.
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