What is the percentage of students whose height is in the class interval 160-170? (correct to the nearest integer)
Total number of students = 15 + 13 + 10 + 14 + 12 + 6 ⇒ Total number of students = 70 Students in class interval 160-170 = 10 + 14 = 24 Percentage of students in class interval 160-170 = (24/Total students) × 100 ⇒ Percentage of students in class interval 160-170 = (24/70) × 100 = 34.28 ∴ The percentage of students whose height is in the class interval of 160-170 is 34% (correct to the nearest integer)
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