Produced by MEI on behalf of OCR © OCR 2013 Introduction to Quantitative Methods Statistics Section 2A: summary measures and diagrams Diagrams for questions.

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Produced by MEI on behalf of OCR © OCR 2013 Introduction to Quantitative Methods Statistics Section 2A: summary measures and diagrams Diagrams for questions

Produced by MEI on behalf of OCR © OCR 2013 Sales of battery operated vehicles in the US Q1

Produced by MEI on behalf of OCR © OCR 2013 Sales of battery operated vehicles in the US Q2

Produced by MEI on behalf of OCR © OCR 2013 Sales of plug-in vehicles in the US Q3 Permission is being sought to use this diagram in this resource.

Produced by MEI on behalf of OCR © OCR 2013 Speed of light In 1880 an American physicist called Albert Michelson designed an experiment to measure the speed of light. He had 5 slightly different experiments, each of which he ran 20 times. His results are shown in these box plots, also called ‘box and whisker’ plots. The horizontal axis shows the speeds he measured, in km/s, after has been subtracted. So a value of 800 actually means km/s. Q4

Produced by MEI on behalf of OCR © OCR 2013 Birthweight Q5 This graph shows the birthweights of 1174 babies in a clinical study.

Produced by MEI on behalf of OCR © OCR 2013 Birthweight birthweight (oz)frequency Here are the birthweights of the same 1174 babies, presented in a grouped frequency table. Q6

Produced by MEI on behalf of OCR © OCR 2013 Acknowledgements Data on battery operated vehicles from Graphs drawn in Excel Nissan Leaf all-electric car (left) and Chevrolet Volt plug-in hybrid (right) charging in Crosswinds, South Carolina, US by Mariordo This file is licensed under the Creative Commons Attribution 2.0 Generic license.Creative CommonsAttribution 2.0 Generic PEV sales 2010 – 2014 by Mariordo This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported licenseCreative CommonsAttribution-Share Alike 3.0 Unported Speed of light data from MICHELSON, A. A. (1882).Experimental determination of the velocity of light made at the United States Naval Academy, Annapolis. Astronomic Papers 1 pp U.S. Nautical Almanac Office Out of Copyright Birthweight data from Child Health and Development Study School of Public Health, University of California, Berkeley