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Mean, Median and Mode Mean What is it? An (arithmetic) mean is the average of a set of n numbers. How do you find it? Add all the elements in a set. Then, divide by the number of elements. Examples: The mean of 7 and 11 is 9. 7+11 The mean of -6, -3, 2, 4, and 4 is .2 (5 elements in the set) Jim's math test scores were 78, 88, 91, and 94.
an or the mean.Medianthe median, symbolized Md. , is the middle score. It cuts the distribution in half, so that there are the same number of scores above the median as ther. are below the median. Because it is the middle score, the median. s the 50th percentil.
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Mean (Arithmetic Mean) To calculate the arithmetic mean of a set of data we must first add up (sum) all of the data values. (x) and then divide the result by the number of values (n). Since. is the symbol used to indicate that values are to be summed (see Sigma Notation) we. obtain the following formula for the mean ( ̄x).
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- Annulus
- Horizontal axis
- 10 11 100 101 110 111 1000 1001 1010 Base 2
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- c d is ad – bc.
- Gradient = v
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- Polyhedron (Plural Polyhedra) A three dimensional shape made up of flat faces
- Positive Rotation
- Pyramid A three dimensional shape whose base is a polygon and whose other
- Sector
- Regular Octagons leave small squares between
- e.g. π (Pi)
- Transversal
- Union
- On a Venn Diagram:
If two circles are concentric, the space between them is called an
www.mathsphere.co.uk Anticlockwise The opposite way to the way the hands on a clock turn. Apex The point directly opposite the base of a two dimensional or three dimensional shape. Apex Apex Base Base Triangle Hexagonal based pyramid
Axis of Symmetry A line through the middle of a shape so that one side of the line is a reflection of the other side: One axis of symmetry
Bisect To cut something in half. In geometry this is normally a line or an angle. www.mathsphere.co.uk Bisector A line that is normally drawn to cut a line or an angle in half. Bisector Line to be bisected. Bisector
Mrs Jones bought 12 Kilos of potatoes today. Centre Another word for 'middle'. The centre of a circle is the point which is the same distance from all points on the circumference. Centre of Rotation A point about which a shape is rotated. The centre of rotation may be on the shape being rotated (perhaps even the centre of the shape) or it may be of...
Diagonal A straight line going across a polygon from one vertex to another.
h Graph A way of showing a relationship on a diagram. The most common types of graph are block graphs, line graphs and pie charts. www.mathsphere.co.uk Grid A sequence of (normally) horizontal and vertical intersecting lines used to draw patterns or graphs. Heptagon A polygon with seven sides. Hexagon A polygon with six sides.
www.mathsphere.co.uk Inscribed circle A circle drawn inside a polygon (normally a triangle) so that it just touches each of the sides of the polygon. In a triangle the centre of this circle is obtained by bisecting each angle and putting the compass point at the place where the three bisectors meet.
only. e.g. Cube, cuboid, tetrahedron, dodecahedron etc are all polyhedra. A sphere is not a polyhedron because its surface is curved.
An anti-clockwise rotation. www.mathsphere.co.uk Power The number of times a quantity is multiplied by itself.
edges meet at a point (apex). Pythagoras' Theorem A theorem that states: In a right angled triangle, the square on the hypotenuse is equal to the sum of the squares on the other two sides. Square B
www.mathsphere.co.uk Segment A part of a circle cut off by a chord. Semicircle Half a circle.
www.mathsphere.co.uk Tetrahedron A polyhedron with four faces, each being a triangle. A regular tetrahedron has equilateral triangles for all its faces. Therefore Shown by the sign , therefore indicates the next logical step in a proof or explanation. e.g. 6p = 18 p = 3 Three Dimensional A three dimensional shape is a shape that has length, ...
Translation The movement of a shape in a straight line. This can be in any direction and any distance.
AA line crossing two (normally parallel) lines. Trapezium A quadrilateral with two parallel sides. www.mathsphere.co.uk Travel Graph A graph with time on the horizontal axis and distance travelled on the vertical axis. Trial and Improvement Method A method used for solving problems where the exact answer is not easy to find straight away. Firs...
The process of joining together two or more sets. e.g. A = {red, green, blue, orange, pink} and B = {yellow, pink, black} A B = {red, green, blue, orange, pink, yellow, black}
The shaded area represents A B Unit (i) The last digit in a whole number. The figure before the decimal point. We talk about the 'units column'. (ii) A standard quantity used for measurement. EG. metre, newton, gram, second. (iii) The number of items that are sold together or packaged together. e.g. 'These light bulbs are sold in units ...
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The mean is the most commonly used measure of average close. To calculate the mean, add the values together and divide the total by the number of values. Question
Jul 15, 2009 · This case is an example of a mean which involves a real parameter (t) and thus represents a family of means. Note : this definition of a robust mean is not unique; several slightly different ones ...
Mar 26, 2023 · Definition: Statistics. Statisticsis a collection of methods for collecting, displaying, analyzing, and drawing conclusions from data. Definition: Descriptive statistics. Descriptive statistics is the branch of statistics that involves organizing, displaying, and describing data. Definition: Inferential statistics.
