techno pedagogic content knowledge anaysis (practicum)

3. What is Histogram?
A Histogram is a graphic
representation of a continuous
frequency distribution through
special kind of vertical bar charts.

4. How Histogram Looks?
HISTOGRAM
6
5
4
3
2
1
0
Category 1 Category 2 Category 3 Category 4

5. How to draw Histogram?
• Draw X and Y axis
• Mark the class intervals in X axis and
frequencies in Y axis.
• Plot the corresponding X and Y values in the
graph.
• Draw bars for each corresponding values .

6. Represent the following Frequency
table by Histogram.
Marks Number of Students
10-15 5
15-20 20
20-25 47
25-30 38
30-35 10

7. Construction
Step1:

9. HISTOGRAM
50
45
40
35
30
25
20
15
10
5
0
Number of Students
15-20 20-25 25-30 30-35 35-40
Number of Students