### Home > CCAA > Chapter 9 Unit 10 > Lesson CC3: 9.1.4 > Problem9-47

9-47.

Louis recorded how many times he could jump rope without stopping. Here is his data:

• $50 \:\:15 \:\:102\:\: 64\:\: 29\:\: 55\:\: 100\:\: 97\:\: 48\:\: 81\:\: 61$

Find the median, first quartile, and third quartile of his data.

Arrange the data in ascending numerical order.
$15\:\: 29\:\: 48\:\: 50\:\: 55\:\: 61\:\: 64\:\: 81\:\: 97\:\: 100 \:\:102$

Find the middle number, the middle number of the upper half, and the middle number of the lower half.

Median $= 61$
Upper Quartile $= 97$
What is the value of the lower quartile?