Step-by-step explanation:
D.
subtracting the smallest value of the lower half of the data set from the biggest value of the lowest half of the data set
The lower quartile of a set of data is calculated by subtracting the smallest value of the lower half of the data set from the biggest value of the lowest half of the data set.
"A quartile is a statistical term that describes a division of observations into four defined intervals based on the values of the data and how they compare to the entire set of observations.
Just like the median divides the data into half so that 50% of the measurement lies below the median and 50% lies above it, the quartile breaks down the data into quarters so that 25% of the measurements are less than the lower quartile, 50% are less than the median, and 75% are less than the upper quartile."
From the definition it is clear that,
lower quartile of a set of data is calculated by :
subtracting the smallest value of the lower half of the data set from the biggest value of the lowest half of the data set.
Hence, D is the correct option.
To know more about quartile here
https://brainly.com/question/7039036
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