# Virtual Nerd

NSN - Fractions, Ratios, Rates, and Percents Explained What's the difference between a fraction and a ratio? A fraction is a number that names part of a whole or part of a group. The denominator represents the total number of equal parts the whole is divided into. A ratio is a comparison of two quantities. For example, in a group of five students in which there are 4 boys and 1 girl, the fraction of the group that is female is . The fraction of the group that is male is . DMP - Sample Size Calculator This Sample Size Calculator is presented as a public service of Creative Research Systems survey software. You can use it to determine how many people you need to interview in order to get results that reflect the target population as precisely as needed. You can also find the level of precision you have in an existing sample. Before using the sample size calculator, there are two terms that you need to know. These are: confidence interval and confidence level. If you are not familiar with these terms, click here.

PA - Nth term Explained Hi Alex, By "the nth term" of a sequence we mean an expression that will allow us to calculate the term that is in the nth position of the sequence. For example consider the sequence The pattern is easy to see. The first term is two. The second term is two times two. The Myth of 'I'm Bad at Math' - Miles Kimball & Noah Smith “I’m just not a math person.” We hear it all the time. And we’ve had enough. Because we believe that the idea of “math people” is the most self-destructive idea in America today. The truth is, you probably are a math person, and by thinking otherwise, you are possibly hamstringing your own career. Worse, you may be helping to perpetuate a pernicious myth that is harming underprivileged children—the myth of inborn genetic math ability.

GSS - Angle Side Side What about SSA (Side Side Angle) theorem? There is NO SUCH THING!!!! The ASS Postulate does not exist because an angle and two sides does not guarantee that two triangles are congruent. Difference Between a Percentage and a Rate (as explained by medical field) Often we hear the question, "What is the difference between a percentage and a rate?" They are both calculated using a numerator and a denominator. However, the relationship between the numerator and denominator makes the difference. DMP - Stem and Leaf Displays Stem and Leaf Displays Author(s) David M. GSS - Geometry 2007 Sign In | My Account | HMHEducation | eServices | Online Store | Contact Us | FAQ Find another book Search: Geometry, 2007 Help With the Math

NSN - Basic Number Properties Purplemath There are three basic properties of numbers, and your textbook will probably have just a little section on these properties, somewhere near the beginning of the course, and then you'll probably never see them again (until the beginning of the next course). My impression is that covering these properties is a holdover from the "New Math" fiasco of the 1960s. DMP - When to Use Mean, Median, or Mode Introduction A measure of central tendency is a single value that attempts to describe a set of data by identifying the central position within that set of data. As such, measures of central tendency are sometimes called measures of central location. They are also classed as summary statistics.

GSS - Similar Triangles Definitions and Problems Definition Generally, two triangles are said to be similar if they have the same shape, even if they are scaled, rotated or even flipped over. The mathematical presentation of two similar triangles A1B1C1 and A2B2C2 as shown by the figure beside is: Two triangles are similar if: 1.

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