Presentation And Analysis
Visão Geral
A specimen Extension paper shows a cumulative frequency graph somebody has drawn from a table of examination marks and asks for two criticisms of it. Not for a calculation, not for a value: for two things the person did wrong. The answers the mark scheme wants are that one cumulative total should be 48 rather than 46, and that the points should be plotted at the ends of the class intervals. That is what this topic is really about: handling data correctly enough that the picture you draw tells the truth.
You will classify data as qualitative, discrete or continuous and as grouped or ungrouped, extract data from printed tables and lists, design and use two-way tables, produce the full range of charts and diagrams from tally charts and pictograms to frequency polygons and histograms with equal class intervals, and calculate the median, mean, range, mode and modal class. On the Extension Tier you add histograms with unequal class intervals, cumulative frequency diagrams, box plots, quartiles, the inter-quartile range and percentiles.
Objetivos
- [Core] understand and use qualitative, discrete and continuous data, including grouped and ungrouped data
- [Core] extract data from printed tables and lists
- [Core] design and use two-way tables for grouped and ungrouped data
- [Core] produce charts and diagrams for various data types; scatter graphs, stem-and-leaf, tally charts, pictograms, bar charts, dual and composite bar charts, pie charts, line graphs, frequency polygons, histograms with equal class intervals
- [Extension] histograms with unequal class intervals, cumulative frequency diagrams, box plots
- [Core] calculate median, mean, range, mode and modal class
- [Extension] quartiles and inter-quartile range and percentiles
Mapa mental
Este tema esta mapeado para mostrar como as ideias se ligam.
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Cartoes
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Nota de Aula
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Avaliação da Lição
Parabéns por concluir a lição em Presentation And Analysis. Agora que você explorou o conceitos e ideias-chave, é hora de colocar seu conhecimento à prova. Esta seção oferece uma variedade de práticas perguntas destinadas a reforçar sua compreensão e ajudá-lo a avaliar sua compreensão do material.
Irá encontrar uma mistura de tipos de perguntas, incluindo perguntas de escolha múltipla, perguntas de resposta curta e perguntas de redação. Cada pergunta é cuidadosamente elaborada para avaliar diferentes aspetos do seu conhecimento e competências de pensamento crítico.
Use esta secção de avaliação como uma oportunidade para reforçar a tua compreensão do tema e identificar quaisquer áreas onde possas precisar de estudo adicional. Não te deixes desencorajar pelos desafios que encontrares; em vez disso, vê-os como oportunidades de crescimento e melhoria.
- Here are seven numbers: 13, 6, 12, 7, 6, 4, 8. What is the range? A. 6 B. 7 C. 8 D. 9 Answer: D
- Which of these is continuous data? A. Shoe size B. Number of goals scored C. The mass of a parcel D. Favourite colour Answer: C
- On a histogram with unequal class intervals, what does the vertical axis show? A. Frequency B. Cumulative frequency C. Frequency density D. Class width Answer: C
- On a cumulative frequency diagram, where should the points be plotted? A. At the midpoint of each class B. At the lower end of each class C. At the upper end of each class D. Anywhere within the class Answer: C
- A class covering 20 < t <= 50 on a histogram has frequency density 1.4. How many values are in the class? A. 1.4 B. 21 C. 30 D. 42 Answer: D
Resolva estas questoes na aplicacao
Resolva estas questoes na aplicacao
Livros Recomendados
Para aprender mais, fontes abertas
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Secção do manual
Stem-and-Leaf Graphs (Stemplots), Line Graphs, and Bar Graphs
One simple graph, the stem-and-leaf graph or stemplot , comes from the field of exploratory data analysis. It is a good choice when the data sets are small. To create the plot, divide each observation of data into a stem and a leaf. The leaf consists of a final significant digit . For example, 23 ha
"Introductory Statistics: Stem-and-Leaf Graphs (Stemplots), Line Graphs, and Bar Graphs" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/introductory-statistics/pages/2-1-stem-and-leaf-graphs-stemplots-line-graphs-and-bar-graphs. Access for free at https://openstax.org/books/introductory-statistics/pages/1-introduction
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Secção do manual
Skewness and the Mean, Median, and Mode
Consider the following data set. 4; 5; 6; 6; 6; 7; 7; 7; 7; 7; 7; 8; 8; 8; 9; 10 This data set can be represented by following histogram. Each interval has width one, and each value is located in the middle of an interval. The histogram displays a symmetrical distribution of data. A distribution is
"Introductory Statistics: Skewness and the Mean, Median, and Mode" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/introductory-statistics/pages/2-6-skewness-and-the-mean-median-and-mode. Access for free at https://openstax.org/books/introductory-statistics/pages/1-introduction
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