Mathematics Quiz - Quartiles and Percentiles

The first quartile of the ages of the 200 Grade 8 students is 14 years old. Which of the following statements is true?

• A. 25% of the students are 14 years old and above.

• B. 75% of the students are 14 years old and above.

• C. 100 students are younger than 14 years.

• D. Most of the students are below 14 years old

Which of the following divides the distribution into ten equal parts?

• Deciles

• Median

• Percentiles

• Quartiles

Which of the following measures of position divides a set of data into one hundred equal parts?

• Deciles

• Medians

• Percentiles

• Quartiles

The first quartile of the dataset is equal to the ______.

• 5th decile

• 25th percentile

• 50th percentile

• 75th percentile

What is the position of P22 in the given set of data 2, 4, 4, 5, 6, 7, 8?

• 1.52

• 1.76

• 3.08

• 3.52

Which of the following formulas is used to find the position of percentile?

• k/4 (n+1)

• k/10 (n+1)

• k/100 (n+1)

• k/8 (n+1)

What is the position of the 8th deciles of the given test scores of the ten students: 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100?

• 7th

• 8th

• 9th

• 10th

What is the position of P40 in the set of data 15, 18, 20, 23, 25, 28, 31, 33, 34, 40, 43?

• 2nd element

• 3rd element

• 5th element

• 4th element

Given the set of scores: 9, 10, 11, 12, 13, 14, 15, 16, 17, and 18, what is the position of the first decile?

• 4th

• 3rd

• 2nd

• 1st

From the data given 12, 15, 22, 23, 34, 8, 19, 17,18

what is the value of the lower quartile using Tukey’s Method?

• 12

• 13

• 13.5

• 14