7.1 Dispersion - Ogive

7.1 Dispersion - Ogive

KSSM Form 5 Mathematics

Open Ended

What this shape looks like? (Try to be as imaginative and creative as possible)

Multiple Choice

How to pronounce "ogive"?

• Ejaan: o-gif

• Ejaan: o-jif

• Ejaan: o-jaif

• Ejaan: o-gi-ve

​What is Ogive?

• A type of frequency polygon that shows cumulative frequency.​

• ​It produces S-shaped curve when the cumulative frequencies of a data are plotted and connected.

• ​A very useful tool to determine the median, quartiles and percentiles for grouped data.

​

​What is Ogive?

​y-axis: Cumulative Frequency

​x-axis: Upper Boundary

​Cu-Up

Multiple Choice

Determine the median of the masses of pineapples. (Teks book: pg211)

• 40

• 50

• 699.5

• 729.5

​Median & Quartiles

​Median & Quartiles

​Median & Quartiles

Multiple Choice

The arrows show the positions and values of  $$Q_1,\ Q_{2\ }and\ Q_3\$$   and  $$Q_3=284.5$$  , can you guess what is the value of 10th percentile, $$P_{10}$$  ?  (Text book: pg 211)

• $$P_{10}=149.5$$  

• $$P_{10}=159.5$$  

• $$P_{10}=164.5$$  

• $$P_{10}=174.5$$  

Fill in the Blanks

What is the exact value of median? (Text book: pg209)

Fill in the Blanks

What is the exact value of $P_{20}$  ? (Text book: pg 209)

Multiple Select

Which of the following are correct? You need choose all the correct options. (Text book: pg 211)

• $$P_5=469.5$$  

• $$P_{30}=669.5$$  

• $$P_{55}=789.5$$  

• $$P_{90}=899.5$$