Answer:
Mean: 13.5°
Median: 13.5°
Mode: 21°
Midrange: 13°
Explanation:
Mean: Add all of the values together and divide by 8 (the number of values). This is also called average.
Median: The middle value when ranked lowest to highest. In this case there are an even number of values (8), so you have to use the average of the middle two, which are 12 and 15.
Mode: This is the most commonly appearing value, and in this case 21 is the only value that appears twice.
Midrange: To find this you add the highest and lowest values together and divide by two. In this case, those values are 5 and 21.