Step 1: Recall the definition of quartile

DEFINITION: Quartile is median.

Two types: 1) Upper quartile

2) Lower quartile

Upper quartile:

The upper quartile is the median of the higher half of the data.

Lower quartile:

The lower quartile is the median of the lower half of the data.

Step 2: Arrange the numbers from least to greatest.

GIVEN: 16, 41, 63, 67, 82, 90

least to greatest.

16, 41, 63, 67, 82, 90

Step 3: Separate the numbers into a lower half and an upper half.

16, 41, 63, 67, 82, 90

Lower half: 16, 41, 63

Upper half: 67, 82, 90

Step 4: Find the upper quartile in the upper half

Upper quartile in the middle of the upper half.

** ** 67 82 90

The upper quartile is 82.