bargraphandhistograms

Created 3 years ago

Duration 0:08:10
18
Slide Content
1. 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.

• Course 2
• 7-3
• Histograms
3. 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. 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

• 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. 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. 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