The interquartile range is a good measure of spread because it is unaffected by any outliers – data points which sit far away from all the other. Make box-and-whisker plots for the given data : 3 Problems with answers. 1. Compare the spreads of the box plots. Here’s an example of a box plot for data collected on people’s shoe sizes. They use a number line to complete the next 3 questions… Range – The smallest shoe size was 1.5 and the largest was 13, from this we can calculate the range. What was the high score on the test? Students will learn how to make a Box Plot. Determine whether the following statements are TRUE or FALSE regarding this box plot. | Box and Whisker Plot Assessment. Free Worksheets for Teachers and Students. A box and whisker plot (also known as a box plot) is a graph that represents visually data from a five-number summary. Box Plots questions for your custom printable tests and worksheets. They will read and interpret box and whisker plots. 30) Ms. Michalson drew a box-and-whisker plot to represent her students' scores on a recent math test. Compare the centers of the box plots. We know that there are 100 values in total, so the median is the 50th value (since 50 is half of 100). Box-and-whisker plot worksheets have skills to find the five-number summary, to make plots, to read and interpret the box-and-whisker plots, to find the quartiles, range, inter-quartile range and outliers. On the cumulative frequency graph, we need to locate 25 on the cumulative frequency axis and find the corresponding salary. Box Plot Questions Worksheet . Directions: These questions deal with box and whisker plots. Interquartile range (or IQR) is another measure of spread of data. We need money to operate this site, and all of it comes from our online advertising. The 75th value for Welsh Bank corresponds to a salary of £61,000, and the 75th value for The Bank of Finland corresponds to a salary of £68,000. In a hurry? This set of data contains 11 numbers, so we get the following. The second page asks students to plot the information worked out before on a box and whisker plot. 6 9 10 12 14 15 20. What was the high score on the test? 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. Please note that you can also find the download  button below each document. The 25th value for Welsh Bank corresponds to a salary of £44,000, and the 25th value for the Bank of Finland corresponds to a salary of £50,000. Box & Whisker Worksheet. If Jennifer scored a 85 on the test, explain how her grade compares with the rest of her class. Taking too long? Question 2: A class of students sat an exam. Construct a box plot for the following data set. (2 Marks) The box plot below shows the amount spent by people over the Christmas period in 2015. b. b)  From the box plots, make 2 comparisons between the data sets. Also a couple of worksheets to allow students to get some independant practice, plus the data I collected from my year 9s that I got them to draw box plots from to compare my two year 9 classes. To do this, we need the quartiles. The range is one way of measuring the spread of the data, for more information head over here (Mean Median Mode and Range revision). Use this information to construct a complete box plot. Their total marks, out of a possible 100, were recorded. 2. Once you find your worksheet(s), you can either click on the pop-out icon or download button to print or download your desired worksheet(s). Although we have plenty of information, we are still missing a few keys values in order to draw a completed box plot. Display the given data set in a box-and-whisker-plot and answer the set of questions by analyzing the plot. We found some Images about Box Plot Questions Worksheet: PPT looking at how to calculate the quartiles, then how to use these to draw box plots and finally how to compare two box plots. If you use adblocking software please add dsoftschools.com to your ad blocking whitelist. a. Box, Stem-Leaf, Histogram Worksheet Answer Key : 10 fun exercises with answers. Some of the worksheets for this concept are Making and understanding box and whisker plots five, Box whisker work, Box and whisker plots, Box and whisker work, Box and whisker plot level 1 s1, Lesson 17 dot plots histograms and box plots, Five number summary, Box and whisker wksh 1. Get familiarized on creating box plots and stay a step ahead in the classroom with this free printable worksheet. Exam-Style Questions on Box Plots Problems on Box Plots adapted from questions set in previous Mathematics exams. a)  Draw two separate box plots to represent the spread of salaries at each bank. We have the smallest value (220) and the largest value (400), so we will have to work out the remaining values. Two page worksheet. Taking too long? These numbers are median, upper and lower quartile, minimum and maximum data value (extremes). Choose 2 questions from the data … The top 50% of shopping times ? Fun problems that give you the chance to draw a box plot and compare sets of data. Here, it is 8. From the graph, we can see that the smallest value is 10 and the largest is 15.8, so: \text{Range } = 15.8 - 10 = 5.8\text{ seconds}. A box and whisker plot is a diagram that displays the median, quartiles, and extremes of a set of data on a number line to visually portray the distribution of the data. 3. On the cumulative frequency graph, we need to locate 25 on the cumulative frequency axis and find the corresponding weight in kilograms. Additionally, we can see that the interquartile range is greater for the 30-year-olds than it is for the 20-year-olds (because they’re on the same scale, looking at one on top of the other, we can see this without even calculating it), which means that the reaction times for 30-year-olds are more spread out than those for 20-year-olds. (b) Compare the distributions of the girls’ times and the boys’ times. Now we have all the information we need to draw a box plot. Open in new tab Which group has the greater variability in the bottom 50% of shopping times ? When comparing box plots you want to look at the median and interquartile range as your first two comparisons. Find and describe the lower and upper quartiles. Specifically, we are missing the upper quartile and the lowest value. In a hurry? Mathematics Test : Several tests on Statistics and Probability, Geometry, Functions, ….