5-a-day GCSE 9-1; 5-a-day Primary; 5-a-day Further Maths; 5-a-day GCSE A*-G; 5-a-day Core 1; More. The example box plot below shows the distribution of ages of 100 tenants. 15) In a survey, queuing times at supermarket checkouts were recorded. A Box plot can also be drawn from a Cumulative Frequency diagram. They show more information about the data than … Videos, worksheets, 5-a-day and much more Example 1: Sameena recorded the times, in minutes, some girls took to do a jigsaw puzzle. 50% of the Cruisers attended between 7 and 16 car shows. Conditions. 2. Data is represented in many different forms. Credit: Illustration by Ryan Sneed Sample questions What is […] The minimum and maximum values of the box plot are where the cumulative frequency begins and ends. The lower quartile will be the 3rd number and the upper quartile is the 9th number. This website and its content is subject to our Terms and Drawing these points onto a number line will give the following box plot. It looks at what they are, how to draw them and how to interpret them. That’s something to look for when comparing box plots, especially when the medians are similar. One morning, samples of 50 customers were taken at supermarkets A, B, C and D. The box plots represent the results. stratified sampling. - median - IQR - overall spread. What is the lowest mark in the Science test? When working on statistics problems, you probably will have occasion to compare two box plots. Usually it will be drawn with an accompanying axis or number line for context. Age Range: 11-16 Format: web/ppt/xls. The lower quartile will be the 3rd number and the upper quartile is the 9th number. Comparing data sets. Drawing a box plot from a cumulative frequency graph is straightforward as long as the median and quartiles have been found. From working out the cumulative frequency to constructing a box plot to then comparing two data sets, its all covered in these videos. If you are asked to compare box plots (for example between two classes) you should mention at least two things – one about averages, ie median, and one about spread, ie IQR or range. Powered by Create your own unique website with customizable templates. 3) Draw a box plot from a cumulative frequency diagram. Comparing box and whisker diagrams in a meaningful, relevant way is something that higher GCSE students find notoriously difficult. STUDY. Square Wider ranges (whisker length, box size) indicate more variable data. GCSE Maths from Scratch 9.04 Comparing 2 Sets of Data using the Mean and Range - Jack Brown. Using bar charts, pie charts and frequency diagrams can make information easier to digest. (b) On the lower half of the grid above, draw a box plot for the information in the table. (b) Compare the distribution of girls' times and the boys' times. (a) On the grid, draw a box plot to show the information in the table. 6 comments: In other words, it might help you understand a boxplot. Student videos. Comparing Two Box Plots; Comparing Two Box Plots. Short boxes mean their data points consistently hover around the center values. *A video for a quick intro to box plots or as a revision aid. This means that most of the links on this page are not yet active. A box plot (sometimes also called a ‘box and whisker plot’) is one of the many ways we can display a set of data that has been collected. Comparing Box Plots. I read an interesting idea here that I’d never thought of before: “One way to help you interpret box plots is to imagine that the way a data set looks as a histogram is something like a mountain viewed from ground level and a box and whisker diagram is something like a contour map of that mountain as viewed from above”. The image above is a comparison of a boxplot of a nearly normal distribution and the probability density function (pdf) for a normal distribution. probability trees (changing probabilities) cumulative frequency diagrams. Home Economics: Food and Nutrition (CCEA). Just because one box plot has a longer box than another one doesn’t mean it has more data in it. PLEASE NOTE: This navigation system is still under development. If you compare the IQR of the two box plots, the IQR for College 2 is larger than the IQR for College 1. Sign in, choose your GCSE subjects and see content that's tailored for you. Box plots are particularly good for comparing different distributions at a glance. Box into two a great activity to show statistics used in context plot shows a visual representation the!, 14, 17, 18, 19, 21 goes over how to interpret them included. 100 tenants to upload relevant resources and activate these links taken at supermarkets a,,. 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