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Tables Charts & Graphs 3-Jun-14Created by Mr. Lafferty Maths Dept. Relative Frequency Reading Pie Charts www.mathsrevision.com Constructing Pie Charts.

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Presentation on theme: "Tables Charts & Graphs 3-Jun-14Created by Mr. Lafferty Maths Dept. Relative Frequency Reading Pie Charts www.mathsrevision.com Constructing Pie Charts."— Presentation transcript:

1 Tables Charts & Graphs 3-Jun-14Created by Mr. Lafferty Maths Dept. Relative Frequency Reading Pie Charts Constructing Pie Charts Cumulative Frequency Tables Dot Plots Cumulative Frequency Graphs Five Figure Summary Box Plots S5 Int2

2 Starter Questions 3-Jun-14Created by Mr Lafferty Maths Dept S5 Int2 1Factorize 3x 3 – 9 2A car depreciates at 15% per year. How much is it worth after 3 years, if it cost £12000 initially? 3Write 85% as a common fraction in its simplest form.

3 Tables Charts & Graphs 3-Jun-14Created by Mr Lafferty Maths Dept Learning Intention Success Criteria 1.Know the term relative frequency. 1.To understand the term relative frequency. 2.Calculate relative frequency from data given. Relative Frequency S5 Int2

4 Tables Charts & Graphs 3-Jun-14Created by Mr Lafferty Maths Dept Relative Frequency How often an event happens compared to the total number of events.CountryFrequency Relative Frequency France180 Italy90 Spain90 Total Example : Wine sold in a shop over one week 180 ÷ 360 = 90 ÷ 360 = 90 ÷ 360 = Relative Frequency always added up to 1 S5 Int2

5 Tables Charts & Graphs 3-Jun-14Created by Mr Lafferty Maths Dept Relative Frequency How often an event happens compared to the total number of events.BoysGirlsTotalFrequency Relative Frequency Example Calculate the relative frequency for boys and girls born in the Royal Infirmary hospital in December Relative Frequency Relative Frequency adds up to 1 S5 Int2

6 Question 1 Page 138 Created by Mr. Lafferty Maths Dept. This question gives a breakdown of 5 hours on watching sport on TV. The time is recorded to the nearest 5 minutes. First, we create a table of values and work out the frequencies. SPORTFREQUENCY (M) REL. FREQCY Football120 Golf60 Swimming45 Athletics30 Equestrian15 Others30 TOTAL Tables Charts & Graphs S5 Int2

7 Tables Charts & Graphs 3-Jun-14Created by Mr. Lafferty Maths Dept. We add the frequencies to get a total SPORTFREQUENCY (M) REL. FREQCY Football120 Golf60 Swimming45 Athletics30 Equestrian15 Others30 TOTAL S5 Int2 300

8 SPORTFREQUENCY (M) REL. FREQCY Football ÷ 300 = 0.4 Golf60 60 ÷ 300 = 0.2 Swimming45 45 ÷ 300 = 0.15 Athletics30 30 ÷ 300 = 0.1 Equestrian15 15 ÷ 300 = 0.05 Others30 TOTAL300 SPORTFREQUENCY (M) REL. FREQCY Football120 Golf60 Swimming45 Athletics30 Equestrian15 Others30 TOTAL300 3-Jun-14Created by Mr. Lafferty Maths Dept. Then we work out the fraction of time each sport takes SPORTFREQUENCY (M) REL. FREQCY Football ÷ 300 = 0.4 Golf60 Swimming45 Athletics30 Equestrian15 Others30 TOTAL300 SPORTFREQUENCY (M) REL. FREQCY Football ÷ 300 = 0.4 Golf60 60 ÷ 300 = 0.2 Swimming45 Athletics30 Equestrian15 Others30 TOTAL300 SPORTFREQUENCY (M) REL. FREQCY Football ÷ 300 = 0.4 Golf60 60 ÷ 300 = 0.2 Swimming45 45 ÷ 300 = 0.15 Athletics30 Equestrian15 Others30 TOTAL300 SPORTFREQUENCY (M) REL. FREQCY Football ÷ 300 = 0.4 Golf60 60 ÷ 300 = 0.2 Swimming45 45 ÷ 300 = 0.15 Athletics30 30 ÷ 300 = 0.1 Equestrian15 Others30 TOTAL300 SPORTFREQUENCY (M) REL. FREQCY Football ÷ 300 = 0.4 Golf60 60 ÷ 300 = 0.2 Swimming45 45 ÷ 300 = 0.15 Athletics30 30 ÷ 300 = 0.1 Equestrian15 15 ÷ 300 = 0.05 Others30 30 ÷ 300 = 0.1 TOTAL300 Tables Charts & Graphs S5 Int2

9 3-Jun-14Created by Mr Lafferty Maths Dept Now try Exercise 1 Ch10 (page 138) Tables Charts & Graphs Relative Frequency S5 Int2

10 Starter Questions Starter Questions 3-Jun-14 Created by Mr. Lafferty Maths Dept. S5 Int2

11 3-Jun-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria Pie Charts Reading Pie Charts 1. To interpret information from Pie Charts. 1.Find the relative frequency for an angle with in a Pie Chart. 2.Use relative frequency to interpret Pie Chart information. S5 Int2

12 3-Jun-14Created by Mr. Lafferty12 Pie charts can be thought of as circle graphs. Reading Pie Charts 1.Work out relative frequency of each angle. 2.Then multiply by the total amount that the circle represents. Two step process

13 3-Jun-14Created by Mr. Lafferty13 A drinks machine dispenses 500 drinks on a Monday. The information is displayed in the pie chart. Use the information to find the number of each drink sold. Tea 72 o 36 o Milk Squash 144 o 108 o Coffee Pie Charts Milk Squash Use the two step process Coffee Tea

14 3-Jun-14Created by Mr Lafferty Maths Dept Now try Exercise 2 Ch10 (page 140) Tables Charts & Graphs Reading Pie Charts S5 Int2

15 Starter Questions Starter Questions 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2 A B C 8cm 53 o 70 o 4cm 2cm 3cm 29 o

16 3-Jun-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria Pie Charts Constructing Pie Charts 1. To construct an accurate Pie-Chart from a given table using fractions of 360 o. 1.Find fractions of 360 o. 2.Use these fractions to construct a Pie Chart given in a table. S5 Int2

17 3-Jun-14Created by Mr. Lafferty Maths Dept. 75 ÷ 300 × 360 = 90° Relative Frequency 90 ÷ 300 × 360 = 108° 45 ÷ 300 × 360 = 54° 60 ÷ 300 × 360 = 72° 30 ÷ 300 × 360 = 36° Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Total300

18 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total300 Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Favourite Sport Squash30

19 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total300 Rugby Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Favourite Sport Squash30

20 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total300 Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Rugby

21 3-Jun-14Created by Mr. Lafferty Maths Dept. Total300 Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Football Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby

22 3-Jun-14Created by Mr. Lafferty Maths Dept. Total300 Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Rugby Football

23 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total300 Cricket Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Rugby Football

24 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total300 Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket

25 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total300 Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Ice Hockey Squash Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket

26 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total300 Rugby Football Cricket Ice Hockey Favourite Sport Squash30 90 o 108 o 54 o 72 o 36 o Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Squash

27 3-Jun-14 Created by Mr. Lafferty Maths Dept. Total Drawing Pie Charts In a survey, people were asked to indicate which one of five sports they liked best. The information is given in the table. Display the information in a pie chart. Rugby Football Cricket Ice Hockey Favourite Sport Squash30 Worksheet Constructing a Pie Chart

28 3-Jun-14Created by Mr. Lafferty Maths Dept. Now try Exercise 3 Ch10 (page 141) Constructing Pie Charts S5 Int2

29 Starter Questions Starter Questions 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2

30 3-Jun-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Add a third cumulative column to a frequency table. 1. To explain how to construct a cumulative Frequency Table. Cumulative Frequency Tables S5 Int2

31 3-Jun-14Created by Mr. Lafferty Maths Dept. You have 1 minute to come up with a question you can easily answer from the table. Example : This table shows the number of cars sold by a motor dealership each day over a seven day period A third column is added to keep a running total. This makes it easier to get the total number of items Cum. Freq. Total so far Cumulative Frequency Tables S5 Int2

32 3-Jun-14 Created by Mr. Lafferty Maths Dept. Cumulative Frequency Tables S5 Int2 Construct a cumulative frequency table for this data FrequencyC. Freq. Total Shoe Size minute to come up with a question

33 3-Jun-14Created by Mr. Lafferty Maths Dept. Now try Exercise 4 Ch10 (page 143) Cumulative Frequency Tables S5 Int2

34 Starter Questions Starter Questions 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2 Waist SizesFrequency

35 3-Jun-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Be able to construct a cumulative frequency graph. 1. To show how to construct a cumulative frequency graph from cumulative frequency table. Cumulative Frequency Tables S5 Int2

36 Cumulative Frequency Graphs How to draw a cumulative frequency graph S5 Int2

37 Km travelled on 1 gallon (mpg) Frequency Cumulative Frequency How to construct a Cumulative Frequency Graph Plot S5 Int2

38 Write down a question you could ask about this graph. Cumulative Frequency Graphs Sometimes called an S – curve graph S5 Int2

39 3-Jun-14Created by Mr. Lafferty Maths Dept. Now try Exercise 5 Ch10 (page 145) S5 Int2 Cumulative Frequency Graphs

40 Starter Questions Starter Questions 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2 10cm 90 o

41 3-Jun-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Be able to construct a dot and identify the key features of various plots. 1. To show how to construct a dot plot and identify key feature.. Dot Plot S5 Int2

42 Dot Plot Dot plots are a very simple yet useful way of getting a feel for data using the number line. S5 Int2

43 Dot Plot S5 Int2 Example :A group of students measure their pulse rates when resting. The rates are 66, 69, 62, 58, 74, 56, 67, 72, 61, 62, Write down as many key points that you can deduce from the plot. 1.Lowest value is 56 BPM. 2.Highest value is 74 BPM. 3.Mode is Median is also Distribution is fairly flat.

44 Dot Plot S5 Int2 Common expressions for various dot plots. Symmetrical distributionWidely spread out distribution Uniform distributionTightly clustered distribution Skewed to the right distributionSkewed to the left distribution By looking at the shape of the distribution try and describe the 6 types we have.

45 3-Jun-14Created by Mr. Lafferty Maths Dept. Now try Exercise 6 Ch10 (page 147) S5 Int2 Dot Plot

46 Starter Questions Starter Questions 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2 33 o

47 3-Jun-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Understand the terms L, H, Q 1, Q 2 and Q To explain the meaning and show how to workout the five summary information for a set of data. S5 Int2 Five Figure Summary 2.Be able to work L, H, Q 1, Q 2 and Q 3 For a set of data

48 When a set of numbers are put in ORDER, it can be summarised by quoting five figures. S5 Int2 Five Figure Summary 1. The highest number(H) 2. The lowest number(L) 3. The median, the number that halves the list (Q 2 ) 4. The upper quartile, the median of the upper half (Q 3 ) 5. The lower quartile, the median of the lower half (Q 1 )

49 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2 Five Figure Summary Example Find the five figure summary for the data. 2, 4, 5, 5, 6, 7, 7, 7, 8, 9, 10 L = Q 3 = Q 2 = Median (middle value) Q 2 = H = Q 1 = The 11 numbers are already in order ! Q 3 = upper middle value Q 1 = lower middle value

50 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2 Five Figure Summary Example Find the five figure summary for the data. 2, 4, 5, 5, 6, 7, 7, 8, 9, 10 L = Q 3 = Q 2 = Median (middle value) Q 2 = H = Q 1 = The 10 numbers are already in order ! Q 3 = upper middle value Q 1 = lower middle value

51 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2 Five Figure Summary Example Find the five figure summary for the data. 2, 4, 5, 5, 6, 7, 8, 9, 10 L = Q 3 = Q 2 = Median (middle value) Q 2 = H = Q 1 = The 9 numbers are already in order ! Q 3 = upper middle value Q 1 = lower middle value

52 3-Jun-14Created by Mr. Lafferty Maths Dept. Now try Exercise 7 Ch10 (page 150) S5 Int2 Five Figure Summary

53 Starter Questions Starter Questions 3-Jun-14Created by Mr. Lafferty Maths Dept. S5 Int2

54 3-Jun-14Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Be able to construct a box plot using the five figure summary data. 1. To show how to construct a box plot using the five figure summary. S5 Int2 Box Plot

55 Two middle values so take the mean. Averages (The Median) The median is the middle value of a set of data once the data has been ordered. Example 1. Robert hit 12 balls at Grimsby driving range. The recorded distances of his drives, measured in yards, are given below. Find the median distance for his drives. 85, 125, 130, 65, 100, 70, 75, 50, 140, 135, 95, 70 Median drive = 90 yards 50, 65, 70, 70, 75, 85, 95, 100, 125, 130, 135, 140 Ordered data

56 Finding the median, quartiles and inter-quartile range. 12, 6, 4, 9, 8, 4, 9, 8, 5, 9, 8, 10 4, 4, 5, 6, 8, 8, 8, 9, 9, 9, 10, 12 Order the data Inter- Quartile Range = 9 - 5½ = 3½ Example 1: Find the median and quartiles for the data below. Lower Quartile = 5½ Q1Q1 Upper Quartile = 9 Q3Q3 Median = 8 Q2Q2

57 Upper Quartile = 10 Q3Q3 Lower Quartile = 4 Q1Q1 Median = 8 Q2Q2 3, 4, 4, 6, 8, 8, 8, 9, 10, 10, 15, Finding the median, quartiles and inter-quartile range. 6, 3, 9, 8, 4, 10, 8, 4, 15, 8, 10 Order the data Inter- Quartile Range = = 6 Example 2: Find the median and quartiles for the data below.

58 Median Lower Quartile Upper Quartile Lowest Value Highest Value Box Whisker Boys Girls cm Box and Whisker Diagrams. Box plots are useful for comparing two or more sets of data like that shown below for heights of boys and girls in a class. Anatomy of a Box and Whisker Diagram.

59 Lower Quartile = 5½ Q1Q1 Upper Quartile = 9 Q3Q3 Median = 8 Q2Q , 4, 5, 6, 8, 8, 8, 9, 9, 9, 10, 12 Example 1: Draw a Box plot for the data below Drawing a Box Plot.

60 Upper Quartile = 10 Q3Q3 Lower Quartile = 4 Q1Q1 Median = 8 Q2Q2 3, 4, 4, 6, 8, 8, 8, 9, 10, 10, 15, Example 2: Draw a Box plot for the data below Drawing a Box Plot

61 Upper Quartile = 180 Q3Q3 Lower Quartile = 158 Q1Q1 Median = 171 Q2Q2 Question: Stuart recorded the heights in cm of boys in his class as shown below. Draw a box plot for this data. Drawing a Box Plot. 137, 148, 155, 158, 165, 166, 166, 171, 171, 173, 175, 180, 184, 186, cm

62 2. The boys are taller on average. Question: Gemma recorded the heights in cm of girls in the same class and constructed a box plot from the data. The box plots for both boys and girls are shown below. Use the box plots to choose some correct statements comparing heights of boys and girls in the class. Justify your answers. Drawing a Box Plot Boys Girls cm 1. The girls are taller on average. 3. The girls show less variability in height. 4. The boys show less variability in height. 5. The smallest person is a girl 6. The tallest person is a boy

63 3-Jun-14Created by Mr. Lafferty Maths Dept. Now try Ex 8 & 9 Ch10 (page 152) S5 Int2 Box Plot


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