DEMONSTRATION TEACHING
GRADE 7 MATHEMATICS
LEARNING COMPETENCY
M7SP-IVf-g-1:
Calculates the measures of central
tendency of ungrouped data
Classroom Rules: The 5 P’s
1. Be prepared
2. Be positive
3. Be productive
4. Be resPectful
5. Be participative
What is a graph?
What forms can be
used for the
summaries of data?
What are the most
common graphical
methods?
ACTIVITY
1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 16, 17, 18,
19, 20, 21, 22, 23, 24, 25, 26,
27, 28, 29, 30.
MEAN
𝑥1 + 𝑥2 + ⋯ + 𝑥𝑛
𝑥=
𝑛
The mean is the average of the
numbers in a set.
What is the mean of the numbers
12, 15, 16, 12, 15, 18, 18, 20, 12
and 18?
What is the mean of the
following scores:
15, 19, 19, 18, 17, 13, 12, 10, 18,
20?
4, 8, 9, 6, 5, 10,
15, 19, 24, 23,
14
4, 5, 6, 8, 9, 10,
14, 15, 19, 23,
24
MEDIAN
x ̃= (N+1)/2
The median is the middle
number in a set of data.
6, 9, 12, 13, 2, 4,
9, 10, 19, 21, 29,
12
2, 4, 6, 9, 9, 10,
12, 12, 13, 19,
21, 29
2, 5, 5, 6, 8, 9
MODE
The mode is the most frequently
occuring number in the data.
4, 7, 8, 9, 11, 13,
15, 19, 2, 11, 11
2, 4, 7, 8, 9, 11,
11, 11, 13, 15,
19
12, 29, 35, 36,
45, 50, 53, 55,
62, 73, 80
Group 1:
Examine the following numbers.
12, 11, 14, 15, 18, 19, 21, 24, 11, 13, 30
1. Arrange the numbers in ascending order.
2. Find the mean, median and mode.
Group 2:
Examine the following numbers.
23, 11, 24, 24, 24, 25, 21, 19, 20, 18
1. Arrange the numbers in ascending order.
2. Find the mean, median and mode.
HELP
What are the
measures of central
tendency?
What is the mean?
What is the median?
What is the mode?
Directions: Find the measures of central tendency of the
following sets of ungrouped data.
1. 12, 13, 14, 15, 18, 19, 20, 22, 25, 27
2. 42, 12, 45, 78, 23, 21, 12, 11, 15, 11, 11
3. 54, 22, 77, 77, 78, 97, 21, 77, 97
4. 1, 2, 3, 4, 5, 6, 7, 8, 9
5. 65, 32, 45, 78, 98, 98, 43, 43, 43
Direction: Arrange the numbers in
ascending order and find the measures
of central tendency.
23, 45, 46, 49, 97, 31, 1, 25, 57, 29, 19