Measures of Data

The median score is also the _____.

• 75th percentile

• 5th decile

• 3rd decile

• 1st quartile

The lower quartile is equal to ______________.

• 50th percentile

• 25th percentile

• 2nd decile

• 3rd quartile

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

In the set of scores: 14, 17, 10, 22, 19, 24, 8, 12, and 19, the median score is _____.

• 17

• 16

• 15

• 13

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 her classmates.

• she surpassed 75% of her 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 old. 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.

Which of these percentiles refer to the median?

• P₁₀

• P₂₅

• P₅₀

• P₇₅

Which of these percentiles refer to the 1st decile?

• P₁₀

• P₂₅

• P₅₀

• P₇₅

If a data set consists of 24 scores, which position is the median?

• 5th

• 10th

• 12th

• 12.5th

What is the upper quartile in the distribution?

• 85

• 90

• 95

• 96