Quartile for Grouped Data

MATHEMATICS 10 Topic: Quartile for Grouped Data LAS No. 3.1 , Quarter 4 Name: Date: Grade 10 - HONESTY Score: Directions: Use the table below to answer the questions that follows. THE HEIGHT IN CENTIMETERS OF 35 STUDENTS Weight Frequency Lower Boundary Greater Than CF Class Interval (f ) ( LB) ( >cf ) 120 - 124 2 119.5 2 125 - 129 4 124.5 6 130 - 134 9 129.5 15 135- 139 10 134.5 25 140 - 144 9 139.5 34 145 - 149 1 144.5 35 Example : SOLVING FOR QUARTILE 1 Solution in Solving Q1 Needed Data Answer 35 Q1 Class 35/4 = 8.75 Q1 = 129.5 +-4x5 9 LB 129.5 Q1 = 129.5 + [ 8.75-6] 2 x 5 9 9 Q1 = 129.5 + 2.75 9 - x 5 N 35 Q1 = 129.5 + (0.305)(5) Cf 6 Q1 = 129.5 + 1.525 5 K 1 Q1 = 131.025 Interpretation: 25% Of the students has a height that is equal or less than 131.025 centimeters. Please see the Summative Test in the Next Page.SOLVING FOR QUARTILE 2 Solution in Solving Q2 Needed Data Answer Q2 = x 5 Q2 Class Q2 = x5 LB Q2 = + = x 5 h N Q2 = + ( _)(5) Cf Q2 = + K Q2 = Interpretation : SOLVING FOR QUARTILE 3 Solution in Solving Q3 Needed Data Answer Q3 = =x 5 Q3 Class Q3 = - x 5 LB Q3 = = x 5 h N Q3 = + )(5) Cf Q3 = + K Q3 = Interpretation