Copyright © Ed2Net Learning, Inc.1 Data & Graphs Grade 5

Copyright © Ed2Net Learning, Inc. 2 Frequency Tables Statistics involves collecting, organizing, analyzing, and presenting data. Data are pieces of information that are often numerical. A frequency table shows the number of pieces of data that fall within given intervals.

Copyright © Ed2Net Learning, Inc. 3 Make a Frequency Table Example: The number of points scored by major league soccer teams in a recent season is shown. Major League Soccer Points Scored

Copyright © Ed2Net Learning, Inc. 4 Make a Frequency Table Step 1: Choose an appropriate scale and interval for the data Scale:1 to 60 Interval:15 The scale includes all of the data, the least number and the greatest The interval separates the scale into equal parts.

Copyright © Ed2Net Learning, Inc. 5 Make a Frequency Table Step 2: Draw a table with three columns and label the columns Points, Tally, and Frequency Step 3: In the first column, list the intervals. In the second column, tally the data. In the third column, add the tallies. Major League Soccer Points Scored, 2001 season PointsTallyFrequency 1-15I III IIII III3 Some frequency tables may not have scales and intervals

Copyright © Ed2Net Learning, Inc. 6 Make a Frequency Table Make a frequency table of the data shown in the table. Surprise Quiz Scores Your Turn

Copyright © Ed2Net Learning, Inc. 7 Line Graphs A line graph is used to show how a set of data changes over a period of time. Number of Coasters The scale and interval are also shown on the vertical axis. A line graph also has titles and labels The categories are written on the horizontal axis. Each frequency is shown using a point.

Copyright © Ed2Net Learning, Inc. 8 Make & Interpret a Line Graph Example: Make a line graph of the data at the left. Then describe the change in the number of tornadoes from 2001 to Step 1; Decide on the scale and the interval. The data includes numbers from 941 to 1,424. The scale is 900 to 1,500 and the interval is 100. U.S.Tornadoes YearTornadoes 19981, , , , ,246

Copyright © Ed2Net Learning, Inc. 9 Make & Interpret a Line Graph Step 2: Label the horizontal and vertical axes. Step 3: Draw and connect the points for each year. Each point shows the number of tornadoes in that year. Step 4: Label the graph with a title. The number of tornadoes decreased from 2001 to 2002 and then increased from 2002 to Tornadoes

Copyright © Ed2Net Learning, Inc. 10 Make & Interpret a Line Graph Your Turn Make a line graph of the data. Then describe the change from 1960 to U.S. Water Consumption YearWater consumed per day (billion gallons)

Copyright © Ed2Net Learning, Inc. 11 Bar Graphs A bar graph is used to compare data. Revenue $ millions Time Sales of toys The scale is written on the vertical axis On this scale, the interval is 50 The categories are written on the horizontal axis. The height of each bar represents the frequency The title and label describe the data

Copyright © Ed2Net Learning, Inc. 12 Make & Interpret a Bar Graph Example: Make a vertical bar graph of the data. Compare the number of students who scored a B to the number who scored a C. Step 1: Decide on the scale and interval. The data includes numbers from 2 to 13. So, a scale from 0 to 14 and an interval of 2 is reasonable. Math Scores GradeFrequency A10 B13 C7 D2

Copyright © Ed2Net Learning, Inc. 13 Make & Interpret a Bar Graph Step 2: Label the horizontal and vertical axes. Step 3: Draw bars for each grade. The height of each bar shows the number of students earning that grade. Step 4: Label the graph with a title. About twice as many students scored a B than a C.

Copyright © Ed2Net Learning, Inc. 14 Make & Interpret a Bar Graph Make a vertical bar graph of the data. Compare the time it takes for a rabbit to be born to the time it takes for a camel to be born. Your Turn Gestation of selected animals AnimalsGestation period (days) Squirrel44 Rabbit31 Puma90 Moose240 Kangaroo36 Camel406

Copyright © Ed2Net Learning, Inc. 15 Circle Graphs A circle graph is used to compare parts of a whole. Analyze data by comparing the size of the sections of the circle. One can compare the percents to analyze the data as well. The pie-shaped sections show the groups. The percents add up to 100% The interior of the circle represents a set of data.

Copyright © Ed2Net Learning, Inc. 16 Circle Graphs The circle graph shows which method of transportation students use to get to Martin Luther King, Jr. Middle School. 1. Which method of transportation do most students use? 2. How does the number of students who ride a moped to school compare to the number of students who take the bus? Your Turn

Copyright © Ed2Net Learning, Inc. 17 Stem & Leaf Plots In a stem-and-leaf plot, the data is ordered from least to greatest and is organized by place value. Step 1: Order the data from least to greatest Step 2: Draw a vertical line and write the tens digits from least to greatest to the left of the line. These digits form the stems. Since the least value is 56 and the greatest value is 97, the stems are 5, 6, 7, 8, and 9. NCAA Division 1 Women’s Basketball Points Scored by Winning Teams,

Copyright © Ed2Net Learning, Inc. 18 Stem & Leaf Plots Step 3: Write the units digits in order to the right of the line with the corresponding stem. The units digits form the leaves. Stem Leaf points key In this data, the tens digit forms the stem. The ones digit of the data form the leaves. Always write each leaf even if it repeats.

Copyright © Ed2Net Learning, Inc. 19 Stem & Leaf Plots Make a stem-and-leaf plot for the data in the table. Average July Highs ( o F) for selected European cities Your Turn

Copyright © Ed2Net Learning, Inc. 20 Making Predictions & Interpreting Graphs Line graphs are often used to predict future events because they show trends over time. Example: You can predict the average temperature for Miami in February by the trend in the line graph.

Copyright © Ed2Net Learning, Inc. 21 Making Predictions & Interpreting Graphs The graph shows the number of participants in bowling from 1975 to What does the graph tell you about the popularity of bowling? Your Turn

Copyright © Ed2Net Learning, Inc. 22 Mean The mean of a set of data is the sum of the data divided by the number of pieces of data. Example: data set : 8, 7, 9, 6, 10 Mean = = 40 = 8 5 5

Copyright © Ed2Net Learning, Inc. 23 Determine how Outliers affect Mean A set of data may contain a value much higher or lower than the other values. This value is called outlier. Outliers can significantly affect the mean. Example: data set : 80, 81, 40, 77, 82 Mean with outlier = = 360 = Mean without outlier = = 320 =

Copyright © Ed2Net Learning, Inc. 24 Median, Mode, and Range The median of a set of data is the middle number of the ordered data, or the mean of the middle two numbers. Examples:  data set: 3, 4, 8, 10, 12  median: 8  data set: 2, 4, 6, 8, 11, 12  median: = 7 2

Copyright © Ed2Net Learning, Inc. 25 Median, Mode, and Range The mode of a set of data is the number or numbers that occur most often. Examples:  data set: 12, 23, 28, 28, 32, 46, 46  modes: 28 and 46

Copyright © Ed2Net Learning, Inc. 26 Median, Mode, and Range The range of a set of data is the difference between the greatest and the least values of the set. Examples:  data set: 125, 45, 67, 150, 32, 12  The greatest value is 150.  The least value is 12.  So, the range is 150 – 12 or 138.

Copyright © Ed2Net Learning, Inc. 27 Median, Mode, and Range Concept Summary MeasureBest Used to describe the data when… Mean The data set has no very high or low numbers. Median The data set has some high or low numbers and most of the data in the middle are close in value. Mode The data set has many identical numbers.

Copyright © Ed2Net Learning, Inc. 28 Median, Mode, and Range What are the mean, median, mode, and range of the temperature data 64 0, 70 0, 56 0, 58 0, 60 0, and Your Turn

Copyright © Ed2Net Learning, Inc. 29 Let us take a break!

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Copyright © Ed2Net Learning, Inc. 31 Box & Whisker Plots A Box-and-whisker plot is a way to show how data are clustered or spread out. Example: The monthly mean temperatures for Burlington, Vermont, are shown. Monthly Normal Temperatures for Burlington, VT MonthJFMAMJJASOND Temp ( 0 F)

Copyright © Ed2Net Learning, Inc. 32 Box & Whisker Plots Step 1: Write the data from least to greatest Step 2: Draw a number line that includes all of the data Step 3: Mark the least and greatest as the lower extreme and upper extreme. Find and label the median Lower ExtremeUpper Extreme Median

Copyright © Ed2Net Learning, Inc. 33 Box & Whisker Plots Step 4: The median of a data set separates the set in half. Find the medians of the lower and upper halves Lower Extreme Upper Extreme Median = 27 2 Median = 62 2 Label these values as lower quartile and upper quartile. Draw a box around the quartile values, and whiskers that extend from each quartile to the extreme data points. Upper Quartile Lower Quartile

Copyright © Ed2Net Learning, Inc. 34 Box & Whisker Plots Draw a Box-and-whisker plot for the set of data below. Baseball Games won by Teams in National League, Your Turn

Copyright © Ed2Net Learning, Inc. 35 Assessment 1) Make a frequency table for the set of data. Number of siblings

Copyright © Ed2Net Learning, Inc. 36 Assessment 2) Make a line graph for the set of data. Zoo Visitors YearVisitors , , , , ,200

Copyright © Ed2Net Learning, Inc. 37 Assessment 3) Name two muffins that together are preferred by half the people surveyed.

Copyright © Ed2Net Learning, Inc. 38 Assessment 4) Describe the trend in the winning times. Predict the winning time in 2006.

Copyright © Ed2Net Learning, Inc. 39 Assessment 5) Make a stem-and-leaf plot for the set of data. 83, 72, 95, 64, 90, 88, 78, 84, 61, 73

Copyright © Ed2Net Learning, Inc. 40 Assessment 6) Find the mean for the set of data. 23, 34, 29, 36, 18, 22, 27

Copyright © Ed2Net Learning, Inc. 41 Assessment 7) Find the median, mode, and range for the set of data. 21, 23, 27, 30

Copyright © Ed2Net Learning, Inc. 42 Assessment 8) Which graph would you show to a telephone customer? Explain.

Copyright © Ed2Net Learning, Inc. 43 Great Job! Remember to do the practice worksheets!!