DAILY LESSON PLAN (DLP)
: Form 4 Dynamic
Number of Students
: 3 December 2013 (Tuesday)
: 9.00am – 10.10am (70 minutes)
: Statistics III
: Mode and Mean of Grouped Data
: At the end of the lesson, students will be able to:- (i) Determine the modal class from the frequency table of grouped data. (ii) Calculate the midpoint of a class.
(iii) Calculate mean from the frequency table of grouped data. Key Points
Class interval with the highest frequency
Midpoint of a class
Is the mean of the class interval.
½ (lower limit + upper limit)
Mean of grouped data
A table that lists the items and uses tally marks to record and show the number of times they occur.
Determine the modal class from the frequency table of grouped data Step 1:
Determine if the class intervals are arranged in sequence: from the lowest class interval to highest class interval. Step 2:
Circle the class interval with the highest frequency.
Calculate the midpoint of a class
Step 1: For each class interval, apply the formula below:
Midpoint of a class = ½ (lower limit + upper limit)
Calculate mean from the frequency table of grouped data
Determine if the class intervals are arranged in sequence in the 1st column, from lowest class interval to highest class interval. Step 2:
Sum up the frequency in the 2nd column.
Find the midpoint of each class interval in the 3rd column by the formula: Midpoint of a class = ½ (lower limit + upper limit)
Multiply midpoint with frequency and write in 4th column.
Mean of grouped data =
Through the learning of statistics, students will be able to practice Bloom’s taxonomy skill of Analyzing. Statistics is a good tool in all sectors to depict chunks of information in a friendly manner. Students will be able to identify the sizes of a group of data applying in daily basis, for instance when doing grocery shopping. 12marks in SPM Math Paper 2, Section B is on Statistics.
The difference between the upper class limit and the lower class limit. Class interval = Upper class limit – Lower class limit
Highest value in a class interval.
Lowest value in a class interval.
: Anchor charts
Character Strengths : Grit, love of learning
(Recommended questions to reflect on: Were the objectives achieved? What students actions caused this? What caused these students actions? What do you want to see in the next class? What actions will you take and why?)
Lecturer’s/ Mentor’s Comments:
Appendix: Handout #1
Mathematics Form 4 Group Practice
A. Determine the modal class in the following frequency tables. Class interval
Modal class =
B. Calculate the midpoint of the following class intervals.
C. Calculate the mean from the following frequency tables.
Midpoint x Frequency
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