Grade 10 Measures of Position

The lower quartile is equal to ________.

• 50th percentile

• 25th percentile

• 2nd decile

• 3rd quartile

75th percentile is equal to __________ quartile.

• Q1

• Q2

• Q3

• Q4

Which of the following is equal to the 7th decile in terms of position?

• Q₃

• P₇₀

• P₇₅

• D₅

In a 100-item test, the passing mark is the 3rd quartile. What does it imply?

• The students should answer at least 75 items correctly to pass the test.

• The students should answer at least 50 items correctly to pass the test.

• The students should answer at most 75 items correctly to pass the test.

• The students should answer at most 50 items correctly to pass the test.

Rochelle got a score of 55, which is equivalent to a 70th percentile rank in a mathematical test. Which of the following is not TRUE?

• She scored above 70% of her classmates.

• Thirty percent of the class got scores of 55 and above.

• If the passing mark is the first quartile, she passed the test

• Her score is below the 5th decile.

If Q₁ = 15 and Q₃ = 23, then the interquartile range is ____?

• 7

• 8

• 9

• 10

In a 70-item test, Melody got a score of 50 which is the third quartile. This means that

• She got the highest score.

• Her score is higher than 25 of his classmates.

• She surpassed 75% of his classmates.

• Seventy-five percent of the class did not pass the test.

The 1st quartile of the ages of 250 fourth year students is 16 years. Which of the following statements is true?

• Most of the students are below 16 years old.

• Seventy-five percent of the students are 16 years old and above.

• Twenty-five percent of the students are 16 years old.

• One hundred fifty students are younger than 16 years.

Given the set of data 3, 15, 18, 20, 32, 17, 16, 19, 33, 30, 21, find the mean or middle value.

• 19

• 17

• 16

• 15

If there are 10 numbers in a set of data, the 2nd quartile is the

• 3rd number

• 4th number

• 5th number

• average of 5th and 6th number