Quartiles of Grouped Data

What is the size of the class interval?

• 5

• 9

• 10

• 20

What is the value of N?

• 30

• 40

• 50

• 60

What class interval does the Q1 class located?

• 31-40

• 41-50

• 51-60

• 61-70

What is the frequency of the Q1 class?

• 4

• 6

• 9

• 13

What class interval does the Q3 class located?

• 61-70

• 51-60

• 41-50

• 31-40

What is the lower boundary of the Q3 class?

• 40.5

• 50.5

• 60.5

• 70.5

Q2 class is highlighted. Calculate the value of Quartile 2.

• 43.8

• 53.8

• 63.8

• 73.8

Carl conducted a survey on the daily allowances of his classmates as part of his requirement in Mathematics 10. He calculated the value of Quartile 1 which is equal to 45.12. How will you interpret the result?

• 25% of Carl's classmates have daily allowances of less than or equal to Php45.12

• 50% of Carl's classmates have daily allowances of less than or equal to Php45.12

• 75% of Carl's classmates have daily allowances of less than or equal to Php45.12

• 45% of Carl's classmates have daily allowances of less than or equal to Php25