A Semi Detailed Lesson Plan In Mathematics 8 Mean Grouped Data Day 2.5.docx

A Semi Detailed Lesson Plan in Mathematics 8

Date: February 15, 2018 Time: 12:15-1:15, 1:15-2:15, 2:15-3:15, 3:30-4:30 PM Section: Cruz, Dagohoy, Ejercito, Bonifacio, Competency: Identify the mean of a grouped data I. Objectives: At the end of the lesson, the students should be able to: 1. Solve for the mean using classmark and coded deviation;; 2. Solve word problems involving mean; and 3. Observe cooperation in performing group tasks. II. Subject Matter A. Topic: Measure of Central Tendency (Mean) B. Reference: Mathematics Learner’s Module pp 490, Abuzo et. Al (2013) C. Materials: Powerpoint presentation, cut outs, activity sheets III. Procedure: A. Preliminary Activities 1. Greetings “Good afternoon, Class!” 2. Opening Prayer “In the name of… AMEN.” 3. Arranging of Chairs “Before taking your seats, please arrange your chairs and pick up the pieces of papers under your chair.” 4. B.

Checking of Attendance Motivation

Wika Rambulan The students will guess the words similar to a popular game in the Philippine television. Is that sticks

Statistics

Me in Grew up day the Mid Ian Poll Lee Mow doll Cow dead Deaf via Xion

Mean Grouped data Median Polymodal Coded Deviation

Car this Xian Ko or Cartesian Coordinate Dean ate Ash Some Me In Assumed mean Freak When See Frequency Clap (-p) sssh Ma arc classmark In there Bal Interval The is core

Test scores

Some as Ion Four mew luh

summation formula

Xen Trawl 10 then Sy Ray an edge

Central tendency range

IV. Lesson Proper A. Activity 1. Group Activity Directions: Complete the Frequency Distribution Table by solving the puzzle and calculate for the Mean using Classmarks and Coded Deviation. Write your complete solution.

Scores in Test 26-30

21-25

? 11-15

6-10

f (The difference between 73 and 63) (The quotient between 200 and 20) (The sum of 4+4) (The product of 5 and 3) (The number between 6 and 8)

X

fX

d

fd

18 0

The student will present their output in the class.

B. Analysis 1. The students will answer the following questions. a. How did you get the classmark? b. What are the steps did you use in order to solve for the mean? c. What can you say about the coded deviation and its assume mean? d. How are you going to differentiate mean with classmark and with coded deviation? C. Abstraction A. Read and analyze. The mean (also known as the arithmetic mean or average) is the most commonly used measure of central tendency. It is used to describe set of data where the

measures cluster around each other, a single value appears to represent distinctively theMean typical value.

To find the mean (𝑥) of grouped data using class marks, Mean 𝑓𝑋 data using class marks, To find the mean (𝑥 ) of grouped 𝑥= 𝑓𝑋 𝑥=𝑓 𝑓 of each class where: f is the frequency where: is the X isf the classfrequency mark of the of classeach class X is the class mark of the class To find the mean (𝑥) of grouped data using code deviation, 𝑓𝑑 𝑥 = 𝐴. 𝑀. + 𝑖 𝑓 where: A.M. is the assumed mean f is the frequency of each class d is the coded deviation from A.M. i is the class interval D. Application Directions: Complete the Frequency Distribution Table and calculate for the Mean using Classmarks and Coded Deviation. Write your complete solution. Score

Frequency ( 𝑓)

Class Mark ( 𝑋)

𝑓𝑋

𝑑

𝑓𝑑

41-45

4

43

172

3

12

36-40

6

38

228

2

12

31-35

7

33

231

1

7

26-30

8

28

224

0

0

21-25

3

23

69

-1

-3

16-20

2

18

36

-2

-4

i=5

E. Assessment

𝑓=30

𝑓𝑋= 960

𝑓𝑑= 24

F. Assignment Bring manila paper and study median of grouped data.

Prepared by:

Checked by:

JOSHUA KIM T. ESCALONA Student Teacher

Mrs. NEDELYN P. ULARTE Cooperating Teacher

Noted by: Mr. EUGENIO U. SARABIA Head Teacher I

Mrs. SHIRLEY G. DAVID Principal II