Histograms 22 August, 2018 A histogram is used instead of a bar chart when the bars have unequal width. This helps to give the graph a more realistic.

Slides:

Advertisements

Similar presentations

Histograms 11 October, 2014 A histogram is used instead of a bar chart when the bars have unequal width. This helps to give the graph a more realistic.

Advertisements

Ζ GCSE - Histograms Dr Frost Objectives: To understand why a histogram is useful for displaying data, and how to both draw and interpret a histogram.

Histograms We are learning to…create and analyze histograms and identify misleading graphs. Saturday, April 15, 2017.

Histograms Objectives:

S 14 Histograms with Unequal Class Intervals

Frequency Distribution TablesHistograms/Polygons Press Ctrl-A ©2009 – Not to be sold/Free to use Stage 4 Year 9.

12-2 Frequency and Histograms

HISTOGRAMS Representing Data. Why use a Histogram When there is a lot of data When data is Continuous a mass, height, volume, time etc Presented in a.

Histograms © Christine Crisp “Teach A Level Maths” Statistics 1.

Quiz 2a  Graphing and Charting. 1. What values are used to form the “box” in a box-plot? a) minimum and maximum b) quartiles 1 and 3 (Q 1 and Q 3 ) c)

Aim: How do we construct a cumulative frequency table/histogram?

Unequal Class Intervals

(c) 2007 IUPUI SPEA K300 (4392) Outline: Graphical Methods Graphical versus Numerical Methods Frequency distributions (tables) Histogram Stem-and-leaf.

Chapter 37 Presentation of Data 2. Learning Objectives Read from a time-series graph Read from a time-series graph Draw a time-series graph Draw a time-series.

I. Making Observations- Observations can be made several different ways. Observations can be put into two different categories; qualitative and quantitative.

Representation of data ----histogram Alpha. Part One : Class boundaries.

Year Sales True or False: Sales are rising rapidly!

Organizing Data Once it is collected, data can be organized in a table. The number of days each student in a class of 25 was recorded as follows: 0, 3,

2.2 Organizing Quantitative Data. Data O Consider the following data O We would like to compute the frequencies and the relative frequencies.

Graphs, Charts and Tables Describing Your Data. Frequency Distributions.

Cumulative frequency graphs

Histograms A Histogram is a vertical bar graph in which each interval is represented by the width of the bar and the frequency is represented by the height.

Chapter 2 Organizing Data

The Graphs of Quadratic Equations A quadratic equation is an equation that has a x 2 value. All of these are quadratics: y = x 2 y = x y = x 2 +

Histograms Objectives: A Grade Interpret a histogram with unequal class intervals Prior knowledge: Draw a Histogram diagram.

HISTOGRAMS Representing Data OCR Module 9. Why use a Histogram When there is a lot of data When data is Continuous a mass, height, volume, time etc Presented.

Unit 16 Data Presentation Pie Charts. Here is table of time spent by a student on homework one evening Represent the data with a pie chart SubjectMathsEnglishPhysicsArtFrenchHistory.

Starter Use the frequency diagram to find: Mode Median Range

Frequency and Histograms. Vocabulary:  Frequency: The number of data values in an interval.  Frequency Table: A table that groups a set of data values.

Learn to display and analyze data in histograms. Course Bar Graphs and Histograms.

Bar Graphs and Histograms. Bar Graphs Bar Graph – a graph that uses bars to show data in categories Example: Favorite color of the class What month that.

Histograms Population data: Lesson 7. Comparing areas instead of heights The bar chart shows the frequencies of the groups of birth rates for Africa.

Histograms All you’ll ever need to know about histograms…

Histograms We are learning to…create and analyze histograms and identify misleading graphs.

GCSE: Histograms Dr J Frost

Grouped Frequency Tables

Histograms We are learning to…create and analyze histograms and identify misleading graphs.

Bringing data to life -statistical approaches to global issues years: Session 3.

Histograms with unequal class widths

Review K16 Paul and Carl have a chance at winning

GCSE: Histograms Dr J Frost

Averages Alevel Stats 1 with Liz.

Ch. 4 – Displaying Quantitative Data (Day 1)

All you’ll ever need to know about histograms…

X AND R CHART EXAMPLE IN-CLASS EXERCISE

LO To Assess your understanding of Data Handling

Here is the graph of a function

how often something occurs

MISLEADING DIAGRAMS.

8.3 Frequency Tables and Histograms

Representing Data OCR Module 9

A graphing calculator is required for some problems or parts of problems 2000.

Histograms: Unequal class Intervals

The Graphs of Quadratic Equations

Histograms © T Madas.

Calculating Averages with

Histograms Example The table shows the weights of employees in a factory. Draw a histogram to represent these results. Weight (kg) Frequency 40 – 70 3.

Displaying Quantitative Data

Histograms A Histogram is a vertical bar graph in which each interval is represented by the width of the bar and the frequency is represented by the height.

True or False? Sales are rising rapidly!

Range, Width, min-max Values and Graphs

Trials & laws & Large Numbers (Large Number Theory)

Calculate the missing information below.

The Graphs of Quadratic Equations

9.4 Part 2: Misleading graphs

Presentation transcript:

Histograms 22 August, 2018 A histogram is used instead of a bar chart when the bars have unequal width. This helps to give the graph a more realistic visual impression.

Time Fish 0 ≤ t < 1 4 1 ≤ t < 5 3 5 ≤ t < 7 An angler keeps a record of the number of fish caught. The angler puts this information onto a bar chart.

Why is the bar chart misleading? Time Fish 0 ≤ t < 1 4 1 ≤ t < 5 3 5 ≤ t < 7 6 5 4 3 2 1 Fish Caught 1 2 3 4 5 6 7 8 9 Time (Hours)

Fish Caught The areas of the bars give a false impression Time Fish 4 1 ≤ t < 5 3 5 ≤ t < 7 6 5 4 3 2 1 To avoid this problem a histogram is used Fish Caught 1 2 3 4 5 6 7 8 9 Time (Hours)

Time Fish Freq ÷ Width = FD 0 ≤ t < 1 4 4 ÷ 1 1 ≤ t < 5 3 3 ÷ 4 ¾ 5 ≤ t < 7 4 ÷ 2 2 4 3 2 1 Frequency Density of Fish Caught 1 2 3 4 5 6 7 8 9 Time (Hours)

F W FD Frequency = Freq. Density x Class Width Freq. Density = Frequency ÷ Width Width = Frequency ÷ Freq. Density Time Fish 0 ≤ t < 2 8 2 ≤ t < 6 4 6 ≤ t < 7 10 Here are the results for another angler’s fishing catch F W Calculate the frequency densities for the data in this table and draw a histogram for the data FD