Posts Tagged ‘accurate’
Friday, November 13th, 2009
An Overview of Composite Numbers
Description
A detailed tutorial on what composite numbers are. Step by step tutorial including several examples of composite numbers and their definition for reference.
Overview
A composite number is the opposite of a prime number. Some people say they are any number that is not prime, but that is not exactly accurate – negative numbers are not prime (even negative prime numbers), and a composite number is not a negative number, it is a positive number. A composite number is any positive integer that has more divisors than itself and one – which are the only two numbers a prime number can be divided by.
Tags: accurate, arithmetic, composite, examples, integer, negative, number, opposite, positive, prime, real
Posted in Arithmetic | No Comments »
Thursday, November 12th, 2009
How to Find the Reciprocal of a Number
Description
A detailed tutorial on how to find the reciprocal of a number. Step by step tutorial including several examples of reciprocals for reference.
Overview
A reciprocal is a way of saying the opposite of a number, although it is not a true opposite. A true opposite of a negative number would be a positive number, and a true opposite of a positive number would be a negative number – that is why there are such things as opposite reciprocals. A more accurate name for a recirpocal would be the reverse of a number. In a fraction, the reciprocal of a number is when the numerator and the denominator are flipped. This also works for whole numbers, because you can think of the number as a numerator with denominator one.
Tags: accurate, arithmetic, denominator, flipped, fraction, integer, negative, number, numerator, opposite, positive, real, reciprocal, reverse, whole
Posted in Arithmetic | No Comments »
Thursday, November 12th, 2009
Introduction to the Margin of Error
Description
A detailed tutorial on the margin of error. Step by step tutorial including several examples of the margin of error for reference.
Overview
The margin of error is a statistic that expresses the amount of possible random sampling errors that could end up in the result of a survey. The bigger the margin of error, the less trustworthy the survey is, because it means that everything falling within the margin of error could possibly be wrong and not accurate. However, if the margin or error is small, then the survey should be very accurate.
Tags: accuracy, accurate, error, less, margin, more, random, results, right, sampling, statistics, survey, true, trustworthy, wrong
Posted in Statistics | No Comments »
Friday, September 25th, 2009
Using Simpson’s Rule to Solve Error Bounds
Description
A detailed tutorial on using Simpson’s rule and solving error bounds. Step by step tutorial including examples of solving error bounds using Simpson’s rule for reference.
Overview
Simpson’s rule is a rule in calculus that is used to solve error bounds. It is the more complicated form of both the trapezoidal rule and the midpoint rule, both of which are also used to calculate error bounds. Although this rule is harder to use than either one of those, it is more accurate. The Simpson’s rule does not use anything except for numbers to calculate the space under a graph, and is expressed by this formula:
![\int_{a}^{b} f(x) \, dx \approx \frac{b-a}{6}\left[f(a) + 4f\left(\frac{a+b}{2}\right)+f(b)\right]](http://s.wordpress.com/latex.php?latex=%20%5Cint_%7Ba%7D%5E%7Bb%7D%20f%28x%29%20%5C%2C%20dx%20%5Capprox%20%5Cfrac%7Bb-a%7D%7B6%7D%5Cleft%5Bf%28a%29%20%2B%204f%5Cleft%28%5Cfrac%7Ba%2Bb%7D%7B2%7D%5Cright%29%2Bf%28b%29%5Cright%5D&bg=ffffff&fg=000000&s=0 "\int_{a}^{b} f(x) \, dx \approx \frac{b-a}{6}\left[f(a) + 4f\left(\frac{a+b}{2}\right)+f(b)\right]")
Tags: accurate, area, calculate, Calculus, error bounds, formula, function, graph, Math, midpoint, Simpson's rule, trapezoidal
Posted in Calculus | No Comments »
