bar chart - a way of presenting data when one variable is discrete or categoric and the other is continuous. Numerical values of variables are represented by the height or length of lines or rectangles of equal width, categoric variable - a variable that can take on one of a limited, and usually fixed, number of possible values, causal relationship - a relationship in which changing one variable leads to, or causes, a change in another variable, continuous variable - a variable that has values that can be any number between a maximum and a minimum, correlation - a relationship where there is a link between two variables, cuboid - a solid which has six rectangular faces at right angles to each other, data - set of values for variables, decimal form - numbers that are between whole numbers can be written in decimal form, for example, 5.1 or 6.72, dependent variable - a variable that changes when you change the independent variable, discrete variable - a variable that can only have whole number values, frequency table - a frequency table shows the number of times that each categoric variable appears in a sample, gradient - the degree of steepness of a graph at any point, histogram - a diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval, independent variable - a variable you change that changes the dependent variable, line of best fit - a smooth line on a graph that travels through or very close to as many of the points plotted as possible, mean - an average of a set of data, found by adding together all the values in the set and dividing by the number of values in the set, median - an average of a set of data, found by listing the values in the set and selecting the middle value. If there are two middle values, the median is hallway between them, metric prefixes - a symbol used to show multiples of a unit, such as the k in km, mode - an average of a set of data. It is the value that appears more often than any other in the data set, order of magnitude - a number to the nearest power of ten, percentage - a rate, number, or amount in each hundred, rate of change - the ration between two related quantities, ratio - the quantitative relation between two amounts showing the number of times one value contains or is contained within the other, reaction rate - the reaction rate for a given chemical reaction is the measure of the change in concentration of the reactants or the change in concentration of the products per unit time, reciprocal - related to another so that their product is 1, significant figures (sig. fig.) - each of the digits of a numbe4r that are used to express it to the required degree of accuracy, starting from the first non-zero digit, standard form - a way of writing down very large or very small numbers easily, y-intercept - the y-intercept of a straight line graph is where the line crosses the y-axis,

Maths for Biology

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