Proportion is a relative of ratio. Ratios compare one part to another part, and proportions compare one part to the whole. Proportion is related to fractions. It is an important rule that applies only to right-angled triangles. Quantitative data are numeric variables or values that can be expressed numerically, i.
Qualitative data are type variables that do not have a numerical value and may be expressed descriptively, i. See our page on types of data for more. The radian is the SI unit for angular measurement. One radian is equivalent to the angle subtended at the centre of a circle by an arc equal in length to the radius.
One radian is just under The term radius is used in the context of circles and other curved shapes. It is the distance between the centre point of a circle, sphere or arc, to its outer edge, surface or circumference.
In statistics, the range of a given data set is the difference between the largest and smallest values. Ratio is a mathematical term used for comparing the size of one part to another part. Ratios are usually shown as two or more numbers separated with a colon, for example, , or The standard deviation of a data set measures how far the data differ from the mean value, i. Where the spread of the data is low and all values are close to the mean, then the standard deviation will be low.
A high standard deviation indicates that the data are spread out over a wider range. A term is a single mathematical expression. It can be a single number, a single variable e.
Terms are usually separated by addition or subtraction operations. A term may include addition or subtraction operations, but only in brackets, e.
A variable is a factor in a mathematical expression, arithmetic relationship or scientific experiment that is subject to change. An experiment usually has three kinds of variables: independent, dependent, and controlled. Variance is a statistical measurement that indicates the spread between members in a data set.
It measures how far each member in the set is from the mean and therefore from every other member in the set. Vectors describe mathematical quantities that have both magnitude and direction. Vectors occur in many maths and physics applications, e. Volume is the three-dimensional space occupied by a solid or hollow shape.
It is quantified by the cubic measurement of the space enclosed by its surfaces. Volume is measured in cubic units, e. This four-part guide takes you through the basics of numeracy from arithmetic to algebra, with stops in between at fractions, decimals, geometry and statistics. Whether you want to brush up on your basics, or help your children with their learning, this is the book for you.
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Accept all cookies Customize settings. Multiplication-product, multiply, multiplied by, times. It almost always means "and," both in and outside of mathematics. In mathematics , we sometimes use it to mean multiplication, particularly with computers. What does [] mean in math? What does OFC mean? Of Course. What does M stand for in texting? What is the upside down U in algebra? The symbol means intersection between two sets.
The intersection of two sets can be defined as follows. Let and be two sets. Meaning: You're afraid the person isn't as cool as you.
Is there a symbol for average? The mathematical symbol or notation for mean is 'x-bar'. The 'mean' or 'arithmetic mean' is the most commonly used form of average.
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