The percentage of values that are less than 30 is: Option C: about 75%
How does a boxplot shows the data points?
A box plot has 5 data description.
- The leftmost whisker shows the minimum value in the data.
- The rightmost whisker shows the maximum value in the data.
- The leftmost line in the box shows the first quartile.
- The middle line shows the median, also called second quartile.
- The last line of the box shows the third quartile.
In box plot, the data values increase from left to right.
What are quartiles?
When we get data which can be compared relatively with each other, for finding quartiles, we arrange them in ascending or descending order.
Quartiles are then selected as 3 points such that they create four groups in the data, each groups approximately possessing 25% of the data.
Lower quartile, also called first quartile has approx 25% in its left partition, and on its right lies approx 75% of the data.
Similarly, second quartile (also called median) is approximately in mid of the data.
Third quartile (also called upper quartile) has approx 75% in its left partition, and on its right lies approx 25% of the data.
So for this case, as visible in the image, the value 30 is the right limit of the box. Thus, it is third quartile.
Since 3rd quartile has 75% of the values in the left, and when we consider box plot, the ordering of the data is from left to right as smaller to larger. Thus, 30 has 75% values less than itself (approximately, (as its not always accurate))
Thus, the percentage of values that are less than 30 is: Option C: about 75%
Learn more about quartiles here:
brainly.com/question/9260741
