GCSE Statistics - Unit 2 All Answers Correct

GCSE Statistics - Unit 2 All Answers Correct What is a database? A collection of information. What is a two-way table? Displays categorical data for two variables. What is a pictogram? A graph that uses symbols or pictures to represent a number of items. What is a bar chart? A type of graph in which the frequency of each variable is represented by the height of the bars. Bars have to be equal width. What is a vertical line graph? It is similar to a bar chart, but with lines instead of bars. What is a multiple bar chart? A bar chart with more than one bar for each class. What is a composite bar chart? A bar chart that groups several bars into one. What is a stem and leaf diagram? A graph showing numerical data split into a stem and leaves. What is a pie chart? A way of displaying data when you want to show how something is shared or divided. What is a comparative pie chart? A pie chart used to compare two sets of data with different total frequencies. What is a population pyramid? A bar graph representing the distribution of population by age and sex. What is a choropleth map? A diagram/map used to classify regions of a geographical area. What is a histogram? Similar to a bar graph but for continuous data so without spaces between bars. What does frequency density = ? frequency / class width What is a frequency polygon? Graphic depiction that uses a line to represent the distribution of frequencies that can be drawn with or without a histogram. What type of data is used for cumulative frequency step polygons? Discrete What type of data is used for cumulative frequency diagrams? Continuous What are the three types of distribution? Symmetrical, positive skew and negative skew. What can make a diagram misleading? If it is 3D, does not have clear scales, labels or key, the source is not obvious, the scale does not start at 0 or does not increase uniformly.