Question
- The heights (in inches) of ten different trees in a park were recorded as:
a) Identify the 5-number summary for this data.
Minimum: Q1: Median:
b) What is the interquartile range?
c) Construct a box plot for the data.
a) Identify the 5-number summary for this data.
Minimum: Q1: Median:
b) What is the interquartile range?
c) Construct a box plot for the data.
Ask by Simpson Stuart. in the United States
Mar 19,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
-
5-Number Summary:
- Minimum: 45
- Q1: 50
- Median: 54.5
- Q3: 59
- Maximum: 62
-
Interquartile Range (IQR): 9
-
Box Plot: Use the 5-number summary to create the box plot.
Solution
To solve the problem, we will follow these steps:
Step 1: Organize the Data
First, we need to sort the heights of the trees in ascending order:
Step 2: Calculate the 5-Number Summary
The 5-number summary consists of the following:
- Minimum
- First Quartile (Q1)
- Median
- Third Quartile (Q3)
- Maximum
a) Identify the 5-number summary
-
Minimum: The smallest value in the dataset.
-
Median: The middle value of the dataset. Since there are 10 values (even number), the median is the average of the 5th and 6th values.
-
First Quartile (Q1): The median of the first half of the data (the first 5 values).
-
Third Quartile (Q3): The median of the second half of the data (the last 5 values).
-
Maximum: The largest value in the dataset.
Thus, the 5-number summary is:
- Minimum: 45
- Q1: 50
- Median: 54.5
- Q3: 59
- Maximum: 62
Step 3: Calculate the Interquartile Range (IQR)
The interquartile range is calculated as:
Step 4: Construct a Box Plot
To construct a box plot, we will use the 5-number summary:
- Minimum: 45
- Q1: 50
- Median: 54.5
- Q3: 59
- Maximum: 62
The box plot will have:
- A box from Q1 (50) to Q3 (59).
- A line at the median (54.5).
- Whiskers extending from the minimum (45) to Q1 and from Q3 to the maximum (62).
Now, I will create the box plot based on the calculated values.
Box Plot Creation
Let’s proceed to create the box plot.
Since I cannot create visual plots directly, I will provide the necessary data for you to create a box plot using any graphing tool or software.
- Box Plot Data:
- Minimum: 45
- Q1: 50
- Median: 54.5
- Q3: 59
- Maximum: 62
You can use this data to create a box plot in software like Excel, Google Sheets, or any statistical software.
Summary of Results
- 5-Number Summary: Minimum: 45, Q1: 50, Median: 54.5, Q3: 59, Maximum: 62
- Interquartile Range (IQR): 9
- Box Plot: Use the provided 5-number summary to create the box plot.
Answered by UpStudy AI and reviewed by a Professional Tutor
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Beyond the Answer
To find the 5-number summary for the tree heights:
- Minimum: This is the smallest value in the dataset, which is
inches. - Q1 (First Quartile): This cuts off the lowest 25% of the data. The sorted heights are
. Q1, being the median of the first half, is . - Median: The median is the middle value of the sorted data, which is the average of the 5th and 6th values:
. - Q3 (Third Quartile): This is the median of the upper half of the dataset, which is
. - Maximum: This is the largest value in the dataset, which is
.
So, summarizing: Minimum: 45, Q1: 50, Median: 54.5, Q3: 58, Maximum: 62.
b) The interquartile range (IQR) is calculated as
, which gives
inches.
c) To construct a box plot:
- Draw a number line and mark the 5-number summary
. - The box extends from Q1 to Q3 (from
to ) with a line at the median ( ). - Draw lines (whiskers) from the box to the minimum and maximum values, completing the box plot.
Now you’ve got a complete understanding of your tree heights! Happy analyzing! 🌳📊