Temperatures were recorded during the beginning of fall season. Find the Quartiles, Median, Lower and
Upper Extremes and make a box and whisker plot for the temperatures below.
80 79 79 79 82 76 72 72 71 75 76 81 81 81 80 79 76 75 74 70 70 69 67 67 65
Step 1: First, you need to find the median of the numbers. To do so, list the numbers in order and cross
out the first and last number of the data until you reach the middle of the data.
65 67 67 69 70 70 71 72 72 74 75 75 76 76 76 79 79 79 79 80 80 81 81 81 82
The median of the data is 76.
Step 2: Second, find the quartiles. There are two quartiles: quartile 1, which is in the lower half of the
data and quartile 3, which is in the upper half of the data (not including the median).
65 67 67 69 70 70 71 72 72 74 75 75 76 76 76 79 79 79 79 80 80 81 81 81 82
Q1: 70.5
Q3: 79.5
Step 3: Find the lower and upper extremes. This will just be anything below Q1 and anything about Q3.
65 67 67 69 70 70 71 72 72 74 75 75 76 76 76 79 79 79 79 80 80 81 81 81 82
Lower Extreme
Upper Extreme
Step 4: Make your box and whisker plot including all the data collected.
Quartile 1
Lower Extreme
Your box and whisker plot should look like this.
Median
Quartile 2
Upper Extreme