bargraphandhistograms

1.0x

bargraphandhistograms

Created 3 years ago

Duration 0:08:10
lesson view count 18
Select the file type you wish to download
Slide Content
  1. Pet Popularity

    Slide 1 - Pet Popularity

    • Type of pet
    • Number of Students
    • Parakeet
    • Dog
    • Cat
    • Hamster
    • 60
    • 50
    • 40
    • 30
    • 20
    • 10
    • 0
    • About 10% of the students have a Parakeet as a pet.
  2. A histogram is a bar graph that shows the frequency of data within equal intervals. There is no space between the bars in a histogram.

    Slide 2 - A histogram is a bar graph that shows the frequency of data within equal intervals. There is no space between the bars in a histogram.

    • Course 2
    • 7-3
    • Histograms
  3. The list below shows the length of the right arm of students in Mrs. Alvarez’s math class.  Make a histogram of the data.

    Slide 3 - The list below shows the length of the right arm of students in Mrs. Alvarez’s math class. Make a histogram of the data.

    • Example:
    • Step 1: Make a frequency table of the data. Divide the data into 4 to 6 equal intervals.
    • Course 2
    • 7-3
    • Histograms
    • 18, 21, 21, 18, 22, 19, 17, 21, 28, 23, 25, 26, 24, 25, 24, 20, 26, 24, 20
    • Interval
    • Tally
    • Frequency
    • 17-19
    • 20-22
    • 23-25
    • 26-28
  4. The list below shows the length of the right arm of students in Mrs. Alvarez’s math class.  Make a histogram of the data.

    Slide 4 - The list below shows the length of the right arm of students in Mrs. Alvarez’s math class. Make a histogram of the data.

    • Example:
    • Step 1: Make a frequency table of the data. Divide the data into 4 to 6 equal intervals.
    • Course 2
    • 7-3
    • Histograms
    • 18, 21, 21, 18, 22, 19, 17, 21, 28, 23, 25, 26, 24, 25, 24, 20, 26, 24, 20
    • Interval
    • Tally
    • Frequency
    • 17-19
    • llll
    • 4
    • 20-22
    • llll l
    • 6
    • 23-25
    • llll l
    • 6
    • 26-28
    • lll
    • 3
  5. Step 2: Choose an appropriate scale and interval for the vertical axis (frequency). The greatest value on the scale should be at least as great as the greatest frequency.

    Slide 5 - Step 2: Choose an appropriate scale and interval for the vertical axis (frequency). The greatest value on the scale should be at least as great as the greatest frequency.

    • 10
    • 8
    • 6
    • 4
    • 2
    • 0
    • Course 2
    • 7-3
    • Histograms
    • Interval
    • Tally
    • Frequency
    • 17-19
    • llll
    • 4
    • 20-22
    • llll l
    • 6
    • 23-25
    • llll l
    • 6
    • 26-28
    • lll
    • 3
  6. Step 3: Draw a bar graph for each interval. The height of the bar is the frequency for that interval. Bars must touch but not overlap.

    Slide 6 - Step 3: Draw a bar graph for each interval. The height of the bar is the frequency for that interval. Bars must touch but not overlap.

    • Course 2
    • 7-3
    • Histograms
    • Because the intervals are equal, all of the bars should have the same width.
    • Caution!
    • Interval
    • Tally
    • Frequency
    • 17-19
    • llll
    • 4
    • 20-22
    • llll l
    • 6
    • 23-25
    • llll l
    • 6
    • 26-28
    • lll
    • 3
    • 10
    • 8
    • 6
    • 4
    • 2
    • 0
  7. Step 4: Label the axes and give the graph a title.

    Slide 7 - Step 4: Label the axes and give the graph a title.

    • 17-19 20-22 23-25 26-28
    • Lengths of Right Arms
    • Frequency
    • Inches
    • Course 2
    • 7-3
    • Bar Graphs and Histograms
    • 10
    • 8
    • 6
    • 4
    • 2
    • 0
    • Don’t forget your T.A.I.L.S.