Respuesta :
Answer:
C) No more than 25% of the data for the sets overlap.
Step-by-step explanation:
A box and whisker plot (also known as a "box plot"), is a graph displaying the distribution of a set of data based on a five number summary.
Five-number summary
- Minimum value = The value at the end of the left whisker.
- Lower quartile (Q₁) = The left side of the box.
- Median (Q₂) = The vertical line inside the box.
- Upper quartile (Q₃) = The right side of the box
- Maximum = The value at the end of the right whisker.
Therefore, the five-number summaries for Set A and Set B are:
Set A
- Minimum = 20
- Q1 = 23.5
- Median = 24
- Q3 = 25.5
- Maximum = 26
Set B
- Minimum = 13
- Q1 = 14.5
- Median = 15.5
- Q3 = 16.5
- Maximum = 23
In terms of percentages of data:
- The median divides the data into two equal halves, with 50% of the data falling below and 50% above it.
- The first quartile (Q1) marks the boundary below which 25% of the data falls.
- The third quartile (Q3) marks the boundary below which 75% of the data falls.
- The interquartile range (IQR) is between the first quartile (Q1) and the third quartile (Q3). It contains the middle 50% of the data.
Answer option a
The maximum data value in Set B is 23, so this means 100% of the data in Set B is 23 or less.
Therefore, the statement "At least 75% of the data is greater than 23" is untrue.
Answer option b
In Set A, the data values between 20 and 23 are contained between the minimum value and Q1 (the first 25% of the data values).
In Set B, the data values between 20 and 23 are contained between Q3 and the maximum value (the last 25% of the data values).
Therefore, up to 25% of the data for each set is between 20 and 23.
Therefore, the statement "More than 50% of the data for each set is between 20 and 23" is untrue.
Answer option c
Part of the lower 25% of Set A (minimum value to Q1) and part of the upper 25% of Set B (Q3 to maximum value) overlap. So no more than 25% of the data for the sets overlap.
Therefore, the statement "No more than 25% of the data for the sets overlap" is true.
Answer option d
The data value 20 falls in the top 25% of Set B, so up to 25% of the data is greater than 20. So no more than 25% of the data for Set B is greater than 20.
Therefore, the statement "More than 25% of the data for each set is greater than 20" is untrue.
