What was the upper quartile of the number of museum visitors?
Understand the Problem
The question is asking for the upper quartile value of the number of visitors recorded at the Creekview History Museum based on the information provided in a box plot.
Answer
The upper quartile value is the line marking Q3 on the box plot.
Answer for screen readers
The upper quartile (Q3) represents the value at the 75th percentile of the number of visitors.
Steps to Solve
- Identify the Data from the Box Plot
Examine the box plot to determine the values of the minimum, lower quartile (Q1), median (Q2), upper quartile (Q3), and maximum.
- Locate the Upper Quartile Value
The upper quartile is the value that separates the highest 25% of the data from the rest. It corresponds to the line that marks Q3 on the box plot.
- Check for the Value
Once you have located the Q3 mark on the box plot, read the corresponding value on the axis to find the upper quartile.
- Confirm Your Result
Verify that the identified Q3 value is indeed the upper quartile by ensuring that at least 75% of the data points are below this value, based on the layout of the box plot.
The upper quartile (Q3) represents the value at the 75th percentile of the number of visitors.
More Information
The upper quartile is an important statistical measure that helps understand the distribution of data. It indicates that 75% of the observations fall below this value, which can be useful for identifying trends or comparing different sets of data.
Tips
- Misreading the box plot: Ensure to carefully check the lines and values given on the plot.
- Confusing the upper quartile with the median: Remember that Q3 is different from the median (Q2).
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