1
Question
In a study of dental problem, the following data were obtained:
Age0−1010−020−3030−4040−5050−6060−7070−80No. of513251430354350Patient
Represent the above data by a frequency polygon.
In a study of dental problem, the following data were obtained:
Age0−1010−020−3030−4040−5050−6060−7070−80No. of513251430354350Patient
Represent the above data by a frequency polygon.
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Solution
Finding the midpoints of the class interval we get.
AgeMid point (x)No. of patients0−105510−20151320−30252530−40351440−50453050−60553560−70654370−807550
The points to be plotted are A(5,5),B(15,13),C(25,25),D(35,14),E(45,30),F(55,35),G(65,43),H(75,50) to obtain the frequency polygon ZABCDEFGHI.
Where I imagined class between 80 and 90.
Finding the midpoints of the class interval we get.
AgeMid point (x)No. of patients0−105510−20151320−30252530−40351440−50453050−60553560−70654370−807550
The points to be plotted are A(5,5),B(15,13),C(25,25),D(35,14),E(45,30),F(55,35),G(65,43),H(75,50) to obtain the frequency polygon ZABCDEFGHI.
Where I imagined class between 80 and 90.
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