Explanation:
To find the mean of the given data, we add all the numbers and then divide by the total number of values:
1.2 + 1.7 + 1.7 + 2.1 + 1.4 + 1.2 + 1.9 = 10.2
Mean = 10.2 / 7 = 1.4571 (rounded to four decimal places)
To find the median, we need to arrange the data in order from smallest to largest:
1.2, 1.2, 1.4, 1.7, 1.7, 1.9, 2.1
The median is the middle value. Since there are an odd number of values, the median is the fourth value, which is 1.7.
Therefore, the mean of the data is 1.4571 and the median is 1.7.