Quartile of Ungrouped Data

1. The lower quartile is equal to______.

A. 50th percentile B. 25th percentile C. 2nd decile D. 3rd quartile

• A. 50th percentile

• B. 25th percentile

• C. 2nd decile

• D. 3rd quartile

2. A group of students obtained the following scores in their statistics quiz 8, 2, 5, 4, 8, 5, 7, 1, 3, 6, 9 . What is the middle quartile?

• A. 3

• B. 5

• C. 6

• D. 8

3. The _______ are the score points which divide a distribution into four equal parts.

• A. Quartiles

• B. Deciles

• C. Percentiles

• D. Statistics

4. The scores of 10 students in a Mathematics seatwork are:

7, 4, 8, 9, 3, 6, 7, 4, 5, 8. What is the lower quartile?

• A. 4

• B. 5

• C. 6

• D. 8

5. the owner of a coffee shop recorded the number of customers who came into his cafe' each hour in a day. The results were 14, 10, 12, 9, 17, 5, 8, 9, 14, 10 and 11. Find the upper quartile of the data?

• A. 10

• B. 12

• C. 14

• D. 17

6. The difference between Q3 and Q1 is called______.

• A. quartile

• B. decile

• C. range

• D. Interquartile range

7. The lower quartile is also known as ____.

• A. First Quartile

• B. Middle Quartile

• C. Upper Quartile

• D. Interquartile

8. What is the formula in calculating the upper quartile?

• A. Qn = 1/4(n+1)

• B. Qn= 3/4(n+1)

• C. Qn=1/2(n+1)

• D. Qn+ (n+1)

9. Which method is best use in finding quartile of ungrouped data?

• A. Mendenhall and Sincich Method

• B. Tukey Method

• C. Mc Cabe Method

• D. Contrast Method

10. What is the first step in calculating the quartile of ungrouped data?

• A. count the number of scores given

• B. Identify the highest and the lowest scores

• C. Write the scores in descending order

• D. Arrange the scores in ascending order