The first quartile (rounded to the nearest tenth if needed) of the following data set is: 15, 16, 17, 23, 11, 19, 20, 15, 18, 22, 15
(1 point)
Responses
15
15
17
17
20
20
17.4
To find the first quartile, we need to arrange the data set in numerical order:
11, 15, 15, 15, 16, 17, 18, 19, 20, 22, 23
Since there are 11 numbers in the data set, the first quartile will be the average of the 3rd and 4th numbers (in this case, the two 15s).
(15 + 15) / 2 = 15
Therefore, the first quartile of this data set is 15.